2392
NGC 2392 is a planetary nebula in Gemini.
- Even
- Composite
Where 2392 fits
Why 2392 is special
Its long-standing informal name was retired by the International Astronomical Union in 2020 as part of a review of offensive common names.
Factors & digit properties
- Divisors (16)
- 1, 2, 4, 8, 13, 23, 26, 46, 52, 92, 104, 184, 299, 598, 1196, 2392
- Prime factorisation
- 2^3 × 13 × 23
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 2392
- Scientific notation
- 2.392 × 10^3
Roman numerals
M M C C C X C I I
MMCCCXCII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 0 0 1 0 1 0 1 1 0 0 0
1 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 2,392
Octal
4 5 3 0
4 × 512 + 5 × 64 + 3 × 8 + 0 × 1 = 2,392
Hexadecimal
9 5 8
9 × 256 + 5 × 16 + 8 × 1 = 2,392
Read as powers of two: 2,048 + 256 + 64 + 16 + 8 = 2,392.
In historical numeral systems
Egyptian
2 lotuses, 3 coils of rope, 9 hobbles, 2 strokes
2 × 1,000 + 3 × 100 + 9 × 10 + 2 × 1 = 2,392. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 9 vertical wedges (sixties place), 5 corner wedges + 2 vertical wedges (units place)
39 × 60 + 52 = 2392. Places are separated by a space on the tablet, with the higher place written first.
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
Related numbers & connections
Both are compact planetary nebulae named for what they resemble through a small telescope rather than for what they are.
View 3242 →Science
NGC 2392 is a double-shelled planetary nebula. The IAU stopped using its previous common name in 2020, part of a broader review of terminology in astronomy.
DocumentedSciencePeriod: 1787–
Common questions
Is 2392 a prime number?
No, 2392 is not prime.
What are the factors of 2392?
The factors of 2392 are 1, 2, 4, 8, 13, 23, 26, 46, 52, 92, 104, 184, 299, 598, 1196, 2392.
What is 2392 in Roman numerals?
2392 in Roman numerals is MMCCCXCII. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MMCCCLXXXXII, 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