228
Mars orbits about 228 million km from the Sun.
- Even
- Composite
Where 228 fits
Why 228 is special
Because both planets move, the distance between Earth and Mars varies from about 55 to 400 million km. Launch windows to Mars open roughly every 26 months, which is why missions cluster rather than launching whenever they are ready.
228 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 12, 19, 38, 57, 76, 114, 228
- Prime factorisation
- 2^2 × 3 × 19
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 228
- Scientific notation
- 2.280 × 10^2
Roman numerals
C C X X V I I I
Binary
1 1 1 0 0 1 0 0
1 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 228
Octal
3 4 4
3 × 64 + 4 × 8 + 4 × 1 = 228
Hexadecimal
e 4
e × 16 + 4 × 1 = 228
Read as powers of two: 128 + 64 + 32 + 4 = 228.
In historical numeral systems
Egyptian
2 coils of rope, 2 hobbles, 8 strokes
2 × 100 + 2 × 10 + 8 × 1 = 228. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 vertical wedges (sixties place), 4 corner wedges + 8 vertical wedges (units place)
3 × 60 + 48 = 228. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sigma, then kappa, then eta, marked as a numeral
sigma-kappa-eta + keraia
sigma + kappa + eta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
resh, then kaf, then het
resh-kaf-het
resh (200) + kaf (20) + het (8) = 228, written in descending order.
Maya
2 bars + 1 dot (upper, twenties place) over 1 bar + 3 dots (lower, units place)
11 × 20 + 8 = 228. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
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 orbits at about 228 million km against Earth's 150. Because both move, the distance between them ranges from about 55 to 400 million km, which is why launch windows open only every 26 months.
View 150 →228 appears in Numbers in space, the topic covering numbers that carry a documented astronomy fact.
Science
The average distance from the Sun to Mars is about 228 million kilometres (the Solar System). The distance from Earth to Mars is a different and far more variable figure, ranging from about 55 to 400 million kilometres as the two planets move around the Sun.
DocumentedScienceGeography: the Solar SystemEarth and Mars align favourably only about every 26 months, so a spacecraft that misses its window waits more than two years. Mars missions therefore arrive in batches from several agencies at once, which is scheduling rather than coincidence.
DocumentedScience
Common questions
Is 228 a prime number?
No, 228 is not prime.
What are the factors of 228?
The factors of 228 are 1, 2, 3, 4, 6, 12, 19, 38, 57, 76, 114, 228.
What is 228 in Roman numerals?
228 in Roman numerals is CCXXVIII.
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