28,978
28978 Ixion is a large Kuiper belt object without a known moon.
- Even
- Composite
Where 28,978 fits
Why 28,978 is special
Its mass is therefore unmeasured, since orbiting companions are how the masses of distant bodies are usually determined.
28,978 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 14489, 28978
- Prime factorisation
- 2 × 14489
- Digit sum
- 34
- Digital root
- 7
Representations
- Decimal
- 28978
- Scientific notation
- 2.898 × 10^4
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 1 0 0 0 1 0 0 1 1 0 0 1 0
1 × 16,384 + 1 × 8,192 + 1 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 28,978
Octal
7 0 4 6 2
7 × 4,096 + 0 × 512 + 4 × 64 + 6 × 8 + 2 × 1 = 28,978
Hexadecimal
7 1 3 2
7 × 4,096 + 1 × 256 + 3 × 16 + 2 × 1 = 28,978
Read as powers of two: 16,384 + 8,192 + 4,096 + 256 + 32 + 16 + 2 = 28,978.
In historical numeral systems
Egyptian
2 fingers, 8 lotuses, 9 coils of rope, 7 hobbles, 8 strokes
2 × 10,000 + 8 × 1,000 + 9 × 100 + 7 × 10 + 8 × 1 = 28,978. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Deficient number
- Happy number
- Semiprime
Related numbers & connections
Both are large Kuiper belt objects whose physical properties remain poorly constrained.
View 50000 →Science
28978 Ixion is a plutino in 2:3 resonance with Neptune. No satellite has been detected, so its mass has not been determined dynamically.
DocumentedSciencePeriod: 2001–
Common questions
Is 28,978 a prime number?
No, 28,978 is not prime.
What are the factors of 28,978?
The factors of 28,978 are 1, 2, 14489, 28978.
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: 15 July 2026