5778
The Sun's surface temperature is about 5,778 kelvin.
- Even
- Composite
Where 5778 fits
Why 5778 is special
The core reaches around 15 million kelvin, so the surface is comparatively cool — and the corona above it is hotter still, at over a million kelvin, which is a genuinely unsolved problem in solar physics rather than a measurement error.
5778 is part of
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 9, 18, 27, 54, 107, 214, 321, 642, 963, 1926, 2889, 5778
- Prime factorisation
- 2 × 3^3 × 107
- Digit sum
- 27
- Digital root
- 9
Representations
- Decimal
- 5778
- Binary
- 1011010010010
- Octal
- 13222
- Hexadecimal
- 1692
- Scientific notation
- 5.778 × 10^3
Other mathematical patterns
- Triangular number
- Abundant number
- Hexagonal number
- Harshad (Niven) number
- Lucas number
Related numbers & connections
The Sun's core is around 15 million kelvin and its visible surface about 5,778. Energy generated at the centre takes a very long time to reach the surface it eventually leaves from.
View 15000000 →Other connections
- contrasts with15000000
why?
Strength 0.50, confidence "high".
Science
The Sun's surface is about 5,778 K, its core around 15 million K, and its corona over a million K. That the thin outer atmosphere is hundreds of times hotter than the surface below it is a genuinely unsolved problem rather than a measurement artefact.
DocumentedScience
Common questions
Is 5778 a prime number?
No, 5778 is not prime.
What are the factors of 5778?
The factors of 5778 are 1, 2, 3, 6, 9, 18, 27, 54, 107, 214, 321, 642, 963, 1926, 2889, 5778.
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