4769
4769 Castalia was the first asteroid imaged by radar.
- Odd
- Composite
Where 4769 fits
Why 4769 is special
Radar showed it is two lobes in contact, which was the first direct evidence that contact binaries exist among asteroids.
Factors & digit properties
- Divisors (4)
- 1, 19, 251, 4769
- Prime factorisation
- 19 × 251
- Digit sum
- 26
- Digital root
- 8
Representations
- Decimal
- 4769
- Binary
- 1001010100001
- Octal
- 11241
- Hexadecimal
- 12a1
- Scientific notation
- 4.769 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
ConnectionBoth are contact binaries, one imaged by radar from Earth and one photographed from a few thousand kilometres.
4769 is associated with 486958Both are contact binaries, one imaged by radar from Earth and one photographed from a few thousand kilometres.
Both are contact binaries, one imaged by radar from Earth and one photographed from a few thousand kilometres.
View 486958 →How is 4769 connected to another number? →
Science
Radar observations of 4769 Castalia in 1989 resolved a bilobed shape, providing the first direct imaging of a contact binary asteroid.
DocumentedSciencePeriod: 1989–
Common questions
Is 4769 a prime number?
No, 4769 is not prime.
What are the factors of 4769?
The factors of 4769 are 1, 19, 251, 4769.
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