Compare 27990 vs 28001
| Property | 27990 | 28001 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 21 × 32 × 51 × 3111 | 280011 |
| Prime factorization | 2 × 3 × 3 × 5 × 311 | 28001 |
| Divisors count | 24 | 2 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 311, 622, 933, 1555, 1866, 2799, 3110, 4665, 5598, 9330, 13995, 27990 | 1, 28001 |
| Number of properties | 0 | 7 |
| Additive primes | 1401st | |
| Chen primes | 1486th | |
| Cousin primes (2nd member) | 447th | |
| Isolated primes | 2165th | |
| Primes | 3056th | |
| Pythagorean primes | 1523rd | |
| Sophie germain primes | 424th | |
| Roman numberals | ||
| Base 2 | 1101101010101102 | 1101101011000012 |
| Base 3 | 11021012003 | 11021020023 |
| Base 4 | 123111124 | 123112014 |
| Base 5 | 13434305 | 13440015 |
| Base 6 | 3333306 | 3333456 |
| Base 7 | 1444147 | 1444317 |
| Base 8 | 665268 | 665418 |
| Base 9 | 423509 | 423629 |
| Base 10 | 2799010 | 2800110 |
| Base 11 | 1a03611 | 1a04611 |
| Base 12 | 1424612 | 1425512 |
| Base 13 | c98113 | c98c13 |
| Base 14 | a2b414 | a2c114 |
| Base 15 | 846015 | 846b15 |
| Base 16 | 6d5616 | 6d6116 |