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 |
Reading 256 in NumGrid context
The 256 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 256 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 256’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
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.