Compare 639 vs 644
| Property | 639 | 644 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 3 | 4 |
| Prime factorization | 32 × 711 | 22 × 71 × 231 |
| Prime factorization | 3 × 3 × 71 | 2 × 2 × 7 × 23 |
| Divisors count | 6 | 12 |
| Divisors | 1, 3, 9, 71, 213, 639 | 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXXXIX | DCXLIV |
| Base 2 | 10011111112 | 10100001002 |
| Base 3 | 2122003 | 2122123 |
| Base 4 | 213334 | 220104 |
| Base 5 | 100245 | 100345 |
| Base 6 | 25436 | 25526 |
| Base 7 | 16027 | 16107 |
| Base 8 | 11778 | 12048 |
| Base 9 | 7809 | 7859 |
| Base 10 | 63910 | 64410 |
| Base 11 | 53111 | 53611 |
| Base 12 | 45312 | 45812 |
| Base 13 | 3a213 | 3a713 |
| Base 14 | 33914 | 34014 |
| Base 15 | 2c915 | 2ce15 |
| Base 16 | 27f16 | 28416 |