1089 (number)
| ||||
|---|---|---|---|---|
| Cardinal | one thousand eighty-nine | |||
| Ordinal | 1089th (one thousand eighty-ninth) | |||
| Factorization | 32 × 112 | |||
| Divisors | 1, 3, 9, 11, 33, 99, 121, 363, 1089 | |||
| Greek numeral | ,ΑΠΘ´ | |||
| Roman numeral | MLXXXIX, mlxxxix | |||
| Binary | 100010000012 | |||
| Ternary | 11111003 | |||
| Senary | 50136 | |||
| Octal | 21018 | |||
| Duodecimal | 76912 | |||
| Hexadecimal | 44116 | |||
1089 is the integer after 1088 and before 1090. It is a square number (33 squared), a nonagonal number, a 32-gonal number, a 364-gonal number, and a centered octagonal number. 1089 is the first reverse-divisible number. The next is 2178 (= 1089 × 2 = 8712/4), and they are the only four-digit numbers that divide their reverse.