| ||||
|---|---|---|---|---|
| Cardinal | twenty-eight | |||
| Ordinal | 28th (twenty-eighth) | |||
| Factorization | 22 × 7 | |||
| Divisors | 1, 2, 4, 7, 14, 28 | |||
| Greek numeral | ΚΗ´ | |||
| Roman numeral | XXVIII | |||
| Binary | 111002 | |||
| Ternary | 10013 | |||
| Senary | 446 | |||
| Octal | 348 | |||
| Duodecimal | 2412 | |||
| Hexadecimal | 1C16 | |||
28 (twenty-eight) is the natural number following 27 and preceding 29.