Compare 1978 vs 1990
| Property | 1978 | 1990 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 3 | 3 |
| Prime factorization | 21 × 231 × 431 | 21 × 51 × 1991 |
| Prime factorization | 2 × 23 × 43 | 2 × 5 × 199 |
| Divisors count | 8 | 8 |
| Divisors | 1, 2, 23, 43, 46, 86, 989, 1978 | 1, 2, 5, 10, 199, 398, 995, 1990 |
| Number of properties | 0 | 0 |
| Roman numberals | MCMLXXVIII | MCMXC |
| Base 2 | 111101110102 | 111110001102 |
| Base 3 | 22010213 | 22012013 |
| Base 4 | 1323224 | 1330124 |
| Base 5 | 304035 | 304305 |
| Base 6 | 130546 | 131146 |
| Base 7 | 55247 | 55427 |
| Base 8 | 36728 | 37068 |
| Base 9 | 26379 | 26519 |
| Base 10 | 197810 | 199010 |
| Base 11 | 153911 | 154a11 |
| Base 12 | 118a12 | 119a12 |
| Base 13 | b9213 | ba113 |
| Base 14 | a1414 | a2214 |
| Base 15 | 8bd15 | 8ca15 |
| Base 16 | 7ba16 | 7c616 |