887
887 Alinda is trapped in a resonance with Jupiter.
- Odd
- Prime
Where 887 fits
Why 887 is special
The resonance steadily raises its eccentricity, which means objects in this state are eventually thrown onto Earth-crossing orbits.
887 is part of
Factors & digit properties
- Divisors (2)
- 1, 887
- Prime factorisation
- 887
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 887
- Scientific notation
- 8.870 × 10^2
Roman numerals
D C C C L X X X V I I
Binary
1 1 0 1 1 1 0 1 1 1
1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 887
Octal
1 5 6 7
1 × 512 + 5 × 64 + 6 × 8 + 7 × 1 = 887
Hexadecimal
3 7 7
3 × 256 + 7 × 16 + 7 × 1 = 887
Read as powers of two: 512 + 256 + 64 + 32 + 16 + 4 + 2 + 1 = 887.
In historical numeral systems
Egyptian
8 coils of rope, 8 hobbles, 7 strokes
8 × 100 + 8 × 10 + 7 × 1 = 887. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 4 vertical wedges (sixties place), 4 corner wedges + 7 vertical wedges (units place)
14 × 60 + 47 = 887. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
omega, then pi, then zeta, marked as a numeral
omega-pi-zeta + keraia
omega + pi + zeta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then tav, then pe, then zayin
tav-tav-pe-zayin
tav (400) + tav (400) + pe (80) + zayin (7) = 887, written in descending order.
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
- Safe prime
Related numbers & connections
The mechanism the asteroid is named after explains orbits that resonances alone do not.
View 3040 →Science
887 Alinda is in a 3:1 mean-motion resonance with Jupiter and 4:1 with Earth. Objects in this resonance undergo eccentricity growth that can produce Earth-crossing orbits.
DocumentedSciencePeriod: 1918–
Common questions
Is 887 a prime number?
Yes, 887 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 887?
The factors of 887 are 1, 887.
What is 887 in Roman numerals?
887 in Roman numerals is DCCCLXXXVII.
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