3390
Mars's radius is about 3,390 km.
- Even
- Composite
Where 3390 fits
Why 3390 is special
Roughly half Earth's radius gives Mars about a tenth of its mass and a quarter of its surface area — close to the land area of Earth, since Earth's surface is mostly ocean. Its low gravity is why it could not retain a thick atmosphere.
Same number, different meanings
How 3390 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Roughly half Earth's radius gives Mars about a tenth of its mass and a quarter of its surface area — close to the land area of Earth, since Earth's surface is mostly ocean. Its low gravity is why it could not retain a thick atmosphere.
- Science
Mars is about half Earth's radius, giving roughly a tenth the mass and a quarter the surface area — comparable to Earth's land area, since Earth is mostly ocean. The low gravity is the reason it could not hold onto a thick atmosphere.
- Technology & computing
Mars has no ocean, so heights cannot be measured from sea level. Elevations are quoted against a reference surface of constant gravitational potential fitted to the planet's mean radius — an areoid, the martian equivalent of a geoid. That convention is what makes Olympus Mons about 22 km tall rather than some other number, and why martian elevations changed slightly when laser altimetry from Mars Global Surveyor replaced earlier estimates.
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 5, 6, 10, 15, 30, 113, 226, 339, 565, 678, 1130, 1695, 3390
- Prime factorisation
- 2 × 3 × 5 × 113
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 3390
- Scientific notation
- 3.390 × 10^3
Roman numerals
M M M C C C X C
MMMCCCXC uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 1 0 1 0 0 1 1 1 1 1 0
1 × 2,048 + 1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 3,390
Octal
6 4 7 6
6 × 512 + 4 × 64 + 7 × 8 + 6 × 1 = 3,390
Hexadecimal
d 3 e
d × 256 + 3 × 16 + e × 1 = 3,390
Read as powers of two: 2,048 + 1,024 + 256 + 32 + 16 + 8 + 4 + 2 = 3,390.
In historical numeral systems
Egyptian
3 lotuses, 3 coils of rope, 9 hobbles
3 × 1,000 + 3 × 100 + 9 × 10 = 3,390. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
5 corner wedges + 6 vertical wedges (sixties place), 3 corner wedges (units place)
56 × 60 + 30 = 3390. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
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 6378 →Other connections
- contrasts with6378
why?
Strength 0.50, confidence "high".
Science
Mars is about half Earth's radius, giving roughly a tenth the mass and a quarter the surface area — comparable to Earth's land area, since Earth is mostly ocean. The low gravity is the reason it could not hold onto a thick atmosphere.
DocumentedScience
Technology & computing
Mars has no ocean, so heights cannot be measured from sea level. Elevations are quoted against a reference surface of constant gravitational potential fitted to the planet's mean radius — an areoid, the martian equivalent of a geoid. That convention is what makes Olympus Mons about 22 km tall rather than some other number, and why martian elevations changed slightly when laser altimetry from Mars Global Surveyor replaced earlier estimates.
DocumentedTechnology & computing
Common questions
Is 3390 a prime number?
No, 3390 is not prime.
What are the factors of 3390?
The factors of 3390 are 1, 2, 3, 5, 6, 10, 15, 30, 113, 226, 339, 565, 678, 1130, 1695, 3390.
What is 3390 in Roman numerals?
3390 in Roman numerals is MMMCCCXC. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MMMCCCLXXXX, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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: 15 July 2026