884
NGC 884 is the second half of the Double Cluster.
- Even
- Composite
Where 884 fits
Why 884 is special
Both clusters are only a few million years old, which is why they are dominated by hot blue stars that will not last.
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 13, 17, 26, 34, 52, 68, 221, 442, 884
- Prime factorisation
- 2^2 × 13 × 17
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 884
- Scientific notation
- 8.840 × 10^2
Roman numerals
D C C C L X X X I V
DCCCLXXXIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 1 0 1 1 1 0 1 0 0
1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 884
Octal
1 5 6 4
1 × 512 + 5 × 64 + 6 × 8 + 4 × 1 = 884
Hexadecimal
3 7 4
3 × 256 + 7 × 16 + 4 × 1 = 884
Read as powers of two: 512 + 256 + 64 + 32 + 16 + 4 = 884.
In historical numeral systems
Egyptian
8 coils of rope, 8 hobbles, 4 strokes
8 × 100 + 8 × 10 + 4 × 1 = 884. 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 + 4 vertical wedges (units place)
14 × 60 + 44 = 884. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
omega, then pi, then delta, marked as a numeral
omega-pi-delta + keraia
omega + pi + delta 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 dalet
tav-tav-pe-dalet
tav (400) + tav (400) + pe (80) + dalet (4) = 884, 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
Related numbers & connections
The Double Cluster is a genuine physical pair at the same distance rather than a line-of-sight coincidence.
View 869 →Both regions are young enough to be dominated by hot stars that will not last on astronomical timescales.
View 1976 →Science
NGC 884 is an open cluster of roughly 12 to 14 million years, containing many luminous blue and red supergiants that will end as supernovae within astronomical timescales.
DocumentedSciencePeriod: antiquity–
Common questions
Is 884 a prime number?
No, 884 is not prime.
What are the factors of 884?
The factors of 884 are 1, 2, 4, 13, 17, 26, 34, 52, 68, 221, 442, 884.
What is 884 in Roman numerals?
884 in Roman numerals is DCCCLXXXIV. IV is subtractive: one before five — five minus one. Written additively it would be DCCCLXXXIIII, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026