even, composite · 138th positive integer
The number 138
138 is an even composite number. It is the 138th positive integer.
Quick reference
| Prime factorization | 2 × 3 × 23 |
| Divisors | 1, 2, 3, 6, 23, 46, 69, 138 |
| Binary | 10001010 |
| Hexadecimal | 0x8A |
| Roman numeral | CXXXVIII |
| Digit sum | 12 |
| Properties | even, composite |
Frequently asked
Is 138 a prime number?
No. 138 is composite. Its prime factorization is 2 × 3 × 23.
What are the factors of 138?
The factors (divisors) of 138 are 1, 2, 3, 6, 23, 46, 69, 138.
What is 138 in binary?
138 in binary is 10001010. In hexadecimal it's 8A.
What is 138 as a Roman numeral?
138 in Roman numerals is CXXXVIII.
What's the digit sum of 138?
Adding the digits of 138: 1 + 3 + 8 = 12.