even, composite · 128th positive integer
The number 128
128 is an even composite number. It is the 128th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| Divisors | 1, 2, 4, 8, 16, 32, 64, 128 |
| Binary | 10000000 |
| Hexadecimal | 0x80 |
| Roman numeral | CXXVIII |
| Digit sum | 11 |
| Properties | even, composite |
Frequently asked
Is 128 a prime number?
No. 128 is composite. Its prime factorization is 2 × 2 × 2 × 2 × 2 × 2 × 2.
What are the factors of 128?
The factors (divisors) of 128 are 1, 2, 4, 8, 16, 32, 64, 128.
What is 128 in binary?
128 in binary is 10000000. In hexadecimal it's 80.
What is 128 as a Roman numeral?
128 in Roman numerals is CXXVIII.
What's the digit sum of 128?
Adding the digits of 128: 1 + 2 + 8 = 11.