Back 1089 (عدد) Arabic 1089 (číslo) Czech 1089 (nùmer) EML 1089 (luku) Finnish 1089 (מספר) HE 1089 (szám) Hungarian 1089 (numero) Italian 1089 Japanese 1089 Korean 1089 (skaitlis) Latvian/Lettish
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| 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,[1] a 32-gonal number, a 364-gonal number, and a centered octagonal number.[2] 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.
- ^ "Sloane's A001106 : 9-gonal (or enneagonal or nonagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-02.
- ^ "Sloane's A016754 : Odd squares: a(n) = (2n+1)^2. Also centered octagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-02.