6378
Earth's equatorial radius is about 6,378 km.
- Even
- Composite
Where 6378 fits
Why 6378 is special
Earth is not a sphere: it bulges at the equator by about 21 km because it spins. That is why the summit of Chimborazo in Ecuador, not Everest, is the point on the surface furthest from the planet's centre.
Factors & digit properties
- Divisors (8)
- 1, 2, 3, 6, 1063, 2126, 3189, 6378
- Prime factorisation
- 2 × 3 × 1063
- Digit sum
- 24
- Digital root
- 6
Representations
- Decimal
- 6378
- Binary
- 1100011101010
- Octal
- 14352
- Hexadecimal
- 18ea
- Scientific notation
- 6.378 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
The Moon's radius is roughly a quarter of Earth's. That ratio is what makes the Moon massive enough to stabilise Earth's axial tilt over geological time.
View 1738 →Mars is about half Earth's radius, giving a tenth the mass and roughly the surface area of Earth's land — since Earth is mostly ocean.
View 3390 →Geography
Earth's equatorial radius exceeds its polar radius by about 21 km because the planet spins. That bulge is why Chimborazo in Ecuador, at a much lower altitude than Everest, is the point on the surface furthest from Earth's centre.
DocumentedGeography
Common questions
Is 6378 a prime number?
No, 6378 is not prime.
What are the factors of 6378?
The factors of 6378 are 1, 2, 3, 6, 1063, 2126, 3189, 6378.
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