even, composite, perfect square · 256th positive integer
The number 256
256 is an even composite number. It is the 256th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| Divisors | 1, 2, 4, 8, 16, 32, 64, 128, 256 |
| Binary | 100000000 |
| Hexadecimal | 0x100 |
| Roman numeral | CCLVI |
| Digit sum | 13 |
| Properties | even, composite, perfect square |
Frequently asked
Is 256 a prime number?
No. 256 is composite. Its prime factorization is 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2.
What are the factors of 256?
The factors (divisors) of 256 are 1, 2, 4, 8, 16, 32, 64, 128, 256.
What is 256 in binary?
256 in binary is 100000000. In hexadecimal it's 100.
What is 256 as a Roman numeral?
256 in Roman numerals is CCLVI.
What's the digit sum of 256?
Adding the digits of 256: 2 + 5 + 6 = 13.