Number reference
180 explained.
180: one hundred eighty, composite, highly composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- one hundred eighty
- Classification
- composite
- Factors
- 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
- Prime factorization
- 2 × 2 × 3 × 3 × 5
- Square root
- 13.416408
- Cube root
- 5.646216
- Binary
- 10110100
- Octal
- 264
- Hexadecimal
- B4
- Roman numeral
- CLXXX
- Digit sum
- 9
- Digital root
- 9
What makes 180 notable
- Highly composite. 180 has 18 divisors — more than any smaller positive number. That is why numbers like this get chosen for units of time, angle, and packaging.
180 in everyday use
One hundred eighty degrees is a straight angle, a half turn, and the sum of the interior angles of any triangle in plane geometry.
Nearby numbers
How to read this page
The factor list shows every way 180 splits into equal whole-number groups — 18 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 180 for contexts that do not use decimal.
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