Compare 1998 vs 2005
| Property | 1998 | 2005 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 21 × 33 × 371 | 51 × 4011 |
| Prime factorization | 2 × 3 × 3 × 3 × 37 | 5 × 401 |
| Divisors count | 16 | 4 |
| Divisors | 1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1998 | 1, 5, 401, 2005 |
| Number of properties | 0 | 1 |
| Semiprimes | 578th | |
| Roman numberals | MCMXCVIII | MMV |
| Base 2 | 111110011102 | 111110101012 |
| Base 3 | 22020003 | 22020213 |
| Base 4 | 1330324 | 1331114 |
| Base 5 | 304435 | 310105 |
| Base 6 | 131306 | 131416 |
| Base 7 | 55537 | 55637 |
| Base 8 | 37168 | 37258 |
| Base 9 | 26609 | 26679 |
| Base 10 | 199810 | 200510 |
| Base 11 | 155711 | 156311 |
| Base 12 | 11a612 | 11b112 |
| Base 13 | ba913 | bb313 |
| Base 14 | a2a14 | a3314 |
| Base 15 | 8d315 | 8da15 |
| Base 16 | 7ce16 | 7d516 |