Number reference
1089 explained.
1089: one thousand eighty-nine, composite, perfect square; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- one thousand eighty-nine
- Classification
- composite
- Factors
- 1, 3, 9, 11, 33, 99, 121, 363, 1089
- Prime factorization
- 3 × 3 × 11 × 11
- Square root
- 33
- Cube root
- 10.288276
- Binary
- 10001000001
- Octal
- 2101
- Hexadecimal
- 441
- Roman numeral
- MLXXXIX
- Digit sum
- 18
- Digital root
- 9
What makes 1089 notable
- Perfect square. 1089 = 33², so a square of side 33 has an area of 1089.
1089 in everyday use
One thousand eighty-nine is the endpoint of a classic digit-reversal trick: take a three-digit number whose first and last digits differ by at least two, subtract its reverse, then add the reverse of that difference. The result is always 1089.
Nearby numbers
How to read this page
The factor list shows every way 1089 splits into equal whole-number groups — 9 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 1089 for contexts that do not use decimal.
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