Number dictionary · Exact arithmetic
2490: factors and number facts
two thousand four hundred ninety is an even number and is composite. Its 16 positive divisors form 8 factor pairs.
Number JD Editorial Team · Updated 2026-10-08
- In words
- two thousand four hundred ninety
- Roman numeral
- MMCDXC
- Prime factorization
- 2 × 3 × 5 × 83
- Digital root
- 6
All factors of 2490
A positive factor divides 2490 with no remainder. In ascending order, the complete list is:
1, 2, 3, 5, 6, 10, 15, 30, 83, 166, 249, 415, 498, 830, 1245, 2490
Factor pairs
- 1 × 2490 = 2490
- 2 × 1245 = 2490
- 3 × 830 = 2490
- 5 × 498 = 2490
- 6 × 415 = 2490
- 10 × 249 = 2490
- 15 × 166 = 2490
- 30 × 83 = 2490
Each pair describes an arrangement of 2490 items into equal rows. The pairs have different row and column counts; 2490 cannot make a square array of whole items.
Divisor totals
- Positive divisors
- 16
- Sum of all divisors
- 6048
- Sum excluding 2490
- 3558
- Classification
- abundant
2490 is abundant because its proper divisors add to 3558, which is greater than 2490.
Prime factorization of 2490
2490 = 2 × 3 × 5 × 83
Repeated division, step by step
- 2490 ÷ 2 = 1245
- 1245 ÷ 3 = 415
- 415 ÷ 5 = 83
- 83 ÷ 83 = 1
Multiply the prime divisors in these steps to reconstruct 2490. Each prime in this factorization occurs once. The divisor-count calculation is (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 16.
The preceding prime is 2477. The next larger prime is 2503. The factor list above explains why 2490 is composite.
Learn the factorization method2490 in words, Roman numerals and other bases
| Representation | Value |
|---|---|
| English (US style) | two thousand four hundred ninety |
| Roman numeral | MMCDXC |
| Binary (base 2) | 100110111010 |
| Octal (base 8) | 4672 |
| Decimal (base 10) | 2490 |
| Hexadecimal (base 16) | 9BA |
Check the binary conversion
Read 100110111010 from right to left using place values 1, 2, 4, 8 and successive powers of two. Keep the values whose bit is 1:
2048 + 256 + 128 + 32 + 16 + 8 + 2 = 2490
Check the hexadecimal conversion
9 × 16^2 + 11 × 16^1 + 10 × 16^0 = 2490
Hexadecimal uses A through F for digit values 10 through 15. These notations represent the same quantity; changing the base does not change the integer.
Square, cube and square root of 2490
- 2490 squared
- 2490 × 2490 = 6,200,100
- 2490 cubed
- 2490 × 2490 × 2490 = 15,438,249,000
- Square root
- ≈ 49.899900
- Simplified radical
- √2490
2490 lies between 2401 (49²) and 2500 (50²), so it is not a perfect square. It is not a perfect cube.
2490 is not triangular: no positive whole-number k satisfies k(k + 1) / 2 = 2490.
Distinguish a square from a square rootMultiplication table for 2490
These are the first twelve positive multiples. Unlike the finite factor list, the sequence of multiples continues without an upper limit.
Divisibility checks
| Divide by | Whole quotient | Remainder | Divides exactly? |
|---|---|---|---|
| 2 | 1245 | 0 | Yes |
| 3 | 830 | 0 | Yes |
| 4 | 622 | 2 | No |
| 5 | 498 | 0 | Yes |
| 6 | 415 | 0 | Yes |
| 7 | 355 | 5 | No |
| 8 | 311 | 2 | No |
| 9 | 276 | 6 | No |
| 10 | 249 | 0 | Yes |
| 11 | 226 | 4 | No |
| 12 | 207 | 6 | No |
For example, 2490 = 7 × 355 + 5. A remainder of zero is what makes a divisor a factor.
Digit sum and digital root of 2490
2490 contains 4 decimal digits. Its digit sum is 2 + 4 + 9 + 0 = 15.
- 2490: 2 + 4 + 9 + 0 = 15
- 15: 1 + 5 = 6
The digital root is 6. Reversing its digits gives 0942; it is not a decimal palindrome. Digit patterns depend on the notation being used.
Digital-root arithmetic always finishes at a single digit for a positive integer. Some numerology methods stop at 11, 22 or 33 instead; that is a separate interpretive convention.
Fractions and a worked comparison
As a fraction of 100, 2490/100 simplifies to 249/10 by dividing both terms by their greatest common divisor, 10. Its decimal value is 24.9. Because the numerator exceeds the denominator, this value is greater than one.
The greatest common divisor of 2490 and 12 is 6. Their least common multiple is 4980. The identity GCD × LCM = 2490 × 12 = 29880 checks both results.
Work through GCF and LCMQuestions about 2490
What are the factors of 2490?
The positive factors are 1, 2, 3, 5, 6, 10, 15, 30, 83, 166, 249, 415, 498, 830, 1245, 2490. There are 16 factors, including 1 and 2490.
Is 2490 a prime number?
No. 2490 is composite: 2 × 3 × 5 × 83 = 2490.
How do you write 2490 in Roman numerals?
2490 is MMCDXC in standard subtractive Roman numeral notation.
What is the binary representation of 2490?
2490 in decimal is 100110111010 in base 2. Adding its active place values gives 2048 + 256 + 128 + 32 + 16 + 8 + 2 = 2490.
Methods and reference definitions
Number JD calculates each result from the integer on this page. Positive factors are enumerated in pairs; repeated division gives the prime factorization; place values verify base conversions. Decimal square roots are rounded to six places when irrational.
NUMBER JOURNAL / JD
A reflective note on 2490
Meaning varies by tradition and personal experience. One sighting is not evidence of what will happen next.
The digits of 2490 add to 15. That arithmetic result is separate from the cultural symbolism of the pattern. If this number matters to you, write down what you noticed and choose one grounded action rather than treating the sighting as a prediction.