800
800 metres is the shortest middle-distance track event — two laps of a standard outdoor track.
- Even
- Composite
Where 800 fits
Why 800 is special
The 800 is the event that belongs to neither discipline. Two laps is too far to sprint and too short to pace conservatively, so runners finish at close to their maximum oxygen uptake having already gone into oxygen debt — physiologically the most demanding common distance. Races start in lanes and break after the first bend, which is why the stagger looks wrong.
Factors & digit properties
- Divisors (18)
- 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800
- Prime factorisation
- 2^5 × 5^2
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 800
- Binary
- 1100100000
- Octal
- 1440
- Hexadecimal
- 320
- Roman numeral
- DCCC
- Scientific notation
- 8.000 × 10^2
Other mathematical patterns
- Abundant number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
The two middle-distance championship events, and the boundary between speed and endurance. The 800 is run above sustainable oxygen uptake from the start; the 1500 is paced. Athletes who double at championship level are unusual for exactly that reason.
View 1500 →The 801 is the electric-only member of the family, carrying a diesel generator solely for the day the wires fail.
View 801 →Sport
Two laps is long enough that a runner cannot hold sprint speed and short enough that pacing conservatively loses the race, so 800 m specialists finish having exceeded their sustainable oxygen uptake and accumulated substantial oxygen debt. Physiologists routinely describe it as the most demanding standard track event for that reason.
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Common questions
Is 800 a prime number?
No, 800 is not prime.
What are the factors of 800?
The factors of 800 are 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800.
What is 800 in Roman numerals?
800 in Roman numerals is DCCC.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026