2340
2340 Hathor is one of the smallest numbered near-Earth asteroids.
- Even
- Composite
Where 2340 fits
Why 2340 is special
At around 300 metres it is well below the size that would be catastrophic globally and well above the size that burns up entirely.
Factors & digit properties
- Divisors (36)
- 1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340
- Prime factorisation
- 2^2 × 3^2 × 5 × 13
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 2340
- Scientific notation
- 2.340 × 10^3
Roman numerals
M M C C C X L
MMCCCXL uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 0 1 0 0 1 0 0 1 0 0
1 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 2,340
Octal
4 4 4 4
4 × 512 + 4 × 64 + 4 × 8 + 4 × 1 = 2,340
Hexadecimal
9 2 4
9 × 256 + 2 × 16 + 4 × 1 = 2,340
Read as powers of two: 2,048 + 256 + 32 + 4 = 2,340.
In historical numeral systems
Egyptian
2 lotuses, 3 coils of rope, 4 hobbles
2 × 1,000 + 3 × 100 + 4 × 10 = 2,340. 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), empty units place
39 × 60 + 0 = 2340. Places are separated by a space on the tablet, with the higher place written first. The second place is empty, and this is precisely the case the early system could not write unambiguously — the same wedges alone would also read as 1.
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
- Harshad (Niven) number
Related numbers & connections
Both are small near-Earth asteroids in the size range producing regional rather than global effects.
View 99942 →Other connections
- is associated with99942
why?
Strength 0.50, confidence "high".
Science
2340 Hathor is an Aten-group asteroid roughly 300 metres across, in the size range that would produce severe regional rather than global effects on impact.
DocumentedSciencePeriod: 1976–
Common questions
Is 2340 a prime number?
No, 2340 is not prime.
What are the factors of 2340?
The factors of 2340 are 1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340.
What is 2340 in Roman numerals?
2340 in Roman numerals is MMCCCXL. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MMCCCXXXX, 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