even, composite, triangular · 990th positive integer
The number 990
990 is an even composite number. It is the 990th positive integer.
Quick reference
| Prime factorization | 2 × 3 × 3 × 5 × 11 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990 |
| Binary | 1111011110 |
| Hexadecimal | 0x3DE |
| Roman numeral | CMXC |
| Digit sum | 18 |
| Properties | even, composite, triangular |
Frequently asked
Is 990 a prime number?
No. 990 is composite. Its prime factorization is 2 × 3 × 3 × 5 × 11.
What are the factors of 990?
The factors (divisors) of 990 are 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990.
What is 990 in binary?
990 in binary is 1111011110. In hexadecimal it's 3DE.
What is 990 as a Roman numeral?
990 in Roman numerals is CMXC.
What's the digit sum of 990?
Adding the digits of 990: 9 + 9 + 0 = 18.