Compare 1988 vs 1991
| Property | 1988 | 1991 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 22 × 71 × 711 | 111 × 1811 |
| Prime factorization | 2 × 2 × 7 × 71 | 11 × 181 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988 | 1, 11, 181, 1991 |
| Number of properties | 0 | 1 |
| Semiprimes | 576th | |
| Roman numberals | MCMLXXXVIII | MCMXCI |
| Base 2 | 111110001002 | 111110001112 |
| Base 3 | 22011223 | 22012023 |
| Base 4 | 1330104 | 1330134 |
| Base 5 | 304235 | 304315 |
| Base 6 | 131126 | 131156 |
| Base 7 | 55407 | 55437 |
| Base 8 | 37048 | 37078 |
| Base 9 | 26489 | 26529 |
| Base 10 | 198810 | 199110 |
| Base 11 | 154811 | 155011 |
| Base 12 | 119812 | 119b12 |
| Base 13 | b9c13 | ba213 |
| Base 14 | a2014 | a2314 |
| Base 15 | 8c815 | 8cb15 |
| Base 16 | 7c416 | 7c716 |