even, composite · 90th positive integer
The number 90
90 is an even composite number. It is the 90th positive integer.
Quick reference
| Prime factorization | 2 × 3 × 3 × 5 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 |
| Binary | 1011010 |
| Hexadecimal | 0x5A |
| Roman numeral | XC |
| Digit sum | 9 |
| Properties | even, composite |
Frequently asked
Is 90 a prime number?
No. 90 is composite. Its prime factorization is 2 × 3 × 3 × 5.
What are the factors of 90?
The factors (divisors) of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.
What is 90 in binary?
90 in binary is 1011010. In hexadecimal it's 5A.
What is 90 as a Roman numeral?
90 in Roman numerals is XC.
What's the digit sum of 90?
Adding the digits of 90: 9 + 0 = 9.