even, composite · 840th positive integer
The number 840
840 is an even composite number. It is the 840th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 3 × 5 × 7 |
| Divisors | 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840 |
| Binary | 1101001000 |
| Hexadecimal | 0x348 |
| Roman numeral | DCCCXL |
| Digit sum | 12 |
| Properties | even, composite |
Frequently asked
Is 840 a prime number?
No. 840 is composite. Its prime factorization is 2 × 2 × 2 × 3 × 5 × 7.
What are the factors of 840?
The factors (divisors) of 840 are 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840.
What is 840 in binary?
840 in binary is 1101001000. In hexadecimal it's 348.
What is 840 as a Roman numeral?
840 in Roman numerals is DCCCXL.
What's the digit sum of 840?
Adding the digits of 840: 8 + 4 + 0 = 12.