180
180 is the maximum score achievable with three darts in a single turn (three treble 20s), and the number of degrees in a straight angle or a half-turn.
- Even
- Composite
Where 180 fits
Why 180 is special
180 is the ceiling of the sport of darts — three treble-20s in one turn is the highest score a player can throw, and tournament callers famously announce it as 'ONE HUNDRED AND EIGHTY!' It's also a basic unit of geometry: a straight line measures 180°, and a triangle's interior angles always sum to 180°.
180 connects to:
- 60 — has multiple
- darts maximum score — appears in
180 is part of
Factors & digit properties
- Divisors (18)
- 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
- Prime factorisation
- 2^2 × 3^2 × 5
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 180
- Binary
- 10110100
- Octal
- 264
- Hexadecimal
- b4
- Roman numeral
- CLXXX
- Scientific notation
- 1.800 × 10^2
Other mathematical patterns
- Abundant number
- Highly composite number
- Harshad (Niven) number
Related numbers & connections
180 is a multiple of 60 (3 × 60) — the value of a single treble-20 in darts, thrown three times to reach the maximum score.
View 60 →180 is the maximum score achievable with three darts in one turn, from three treble-20s.
Mathematically related
- has multiple60
why?
Strength 0.50, confidence "high".
Numbers Around Us
- appears inMaximum three-dart score
why?
Strength 0.50, confidence "high".
Sport
180 is the maximum score achievable with three darts in a single turn — three treble 20s (20 × 3 = 60, thrown three times) — and is announced by tournament callers as 'ONE HUNDRED AND EIGHTY!', one of the sport's most recognisable moments.
DocumentedSportGeography: darts (international)
Mathematics
180° is the measure of a straight angle (a half-turn) and, by a fundamental theorem of Euclidean geometry, the sum of the interior angles of any triangle.
DocumentedMathematics
Common questions
Is 180 a prime number?
No, 180 is not prime.
What are the factors of 180?
The factors of 180 are 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180.
What is 180 in Roman numerals?
180 in Roman numerals is CLXXX.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 30 July 2026