Compare 638 vs 649
| Property | 638 | 649 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 111 × 291 | 111 × 591 |
| Prime factorization | 2 × 11 × 29 | 11 × 59 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 11, 22, 29, 58, 319, 638 | 1, 11, 59, 649 |
| Number of properties | 0 | 1 |
| Semiprimes | 196th | |
| Roman numberals | DCXXXVIII | DCXLIX |
| Base 2 | 10011111102 | 10100010012 |
| Base 3 | 2121223 | 2200013 |
| Base 4 | 213324 | 220214 |
| Base 5 | 100235 | 100445 |
| Base 6 | 25426 | 30016 |
| Base 7 | 16017 | 16157 |
| Base 8 | 11768 | 12118 |
| Base 9 | 7789 | 8019 |
| Base 10 | 63810 | 64910 |
| Base 11 | 53011 | 54011 |
| Base 12 | 45212 | 46112 |
| Base 13 | 3a113 | 3ac13 |
| Base 14 | 33814 | 34514 |
| Base 15 | 2c815 | 2d415 |
| Base 16 | 27e16 | 28916 |