Compare 1388 vs 1391
| Property | 1388 | 1391 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 22 × 3471 | 131 × 1071 |
| Prime factorization | 2 × 2 × 347 | 13 × 107 |
| Divisors count | 6 | 4 |
| Divisors | 1, 2, 4, 347, 694, 1388 | 1, 13, 107, 1391 |
| Number of properties | 0 | 1 |
| Semiprimes | 412th | |
| Roman numberals | MCCCLXXXVIII | MCCCXCI |
| Base 2 | 101011011002 | 101011011112 |
| Base 3 | 12201023 | 12201123 |
| Base 4 | 1112304 | 1112334 |
| Base 5 | 210235 | 210315 |
| Base 6 | 102326 | 102356 |
| Base 7 | 40227 | 40257 |
| Base 8 | 25548 | 25578 |
| Base 9 | 18129 | 18159 |
| Base 10 | 138810 | 139110 |
| Base 11 | 105211 | 105511 |
| Base 12 | 97812 | 97b12 |
| Base 13 | 82a13 | 83013 |
| Base 14 | 71214 | 71514 |
| Base 15 | 62815 | 62b15 |
| Base 16 | 56c16 | 56f16 |