1089 (number)
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1089 is the integer after 1088 and before 1090.
| |||
|---|---|---|---|
| 1089 | |||
| Cardinal | One thousand and eighty-nine | ||
| Ordinal | 1089th | ||
| Factorization | [1089 = 3^2 \cdot 11^2] | ||
| Binary | 10001000001 | ||
| Hexadecimal | 441 | ||
It is a square number (33 squared), a nonagonal number, a 32-gonal number, a 364-gonal number, and a centered octagonal number.
In base 10, the following steps always yield 1089:
- Take any three-digit integer in which the first digit is at least two more than the last.
- Reverse the digits, and subtract the result from the original number.
- Add to this result the number produced by reversing its digits.
732 - 237 = 495 495 + 594 = 1089Multiplying the number 1089 by the integers from 1 to 9 produces a pattern: multipliers adding up to 10 give products that are the digit reversals of each other.
1 x 1089 = 1089 2 x 1089 = 2178 3 x 1089 = 3267 4 x 1089 = 4356 5 x 1089 = 5445 6 x 1089 = 6534 7 x 1089 = 7623 8 x 1089 = 8712 9 x 1089 = 9801Numbers formed analogously in other bases, e.g. octal 1067 or hexadecimal 10EF, also have these properties.
Other uses
- In the Rich Text Format, the language code 1089 indicates the text is in Swahili.
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