1380
1380 is a year in the 14th century. Moscow's victory at Kulikovo was the first major defeat of the Golden Horde by Rus forces (Eastern Europe).
- Even
- Composite
Where 1380 fits
Why 1380 is special
1380 has a profile because of what happened in it rather than because of any property of the number: Moscow's victory at Kulikovo was the first major defeat of the Golden Horde by Rus forces (Eastern Europe).
1380 is part of
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 690, 1380
- Prime factorisation
- 2^2 × 3 × 5 × 23
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1380
- Scientific notation
- 1.380 × 10^3
Roman numerals
M C C C L X X X
Binary
1 0 1 0 1 1 0 0 1 0 0
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,380
Octal
2 5 4 4
2 × 512 + 5 × 64 + 4 × 8 + 4 × 1 = 1,380
Hexadecimal
5 6 4
5 × 256 + 6 × 16 + 4 × 1 = 1,380
Read as powers of two: 1,024 + 256 + 64 + 32 + 4 = 1,380.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 8 hobbles
1 × 1,000 + 3 × 100 + 8 × 10 = 1,380. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 3 vertical wedges (sixties place), empty units place
23 × 60 + 0 = 1380. 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
1380 is a year in the 14th century, in the 1380s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1380, Moscow's victory at Kulikovo was the first major defeat of the Golden Horde by Rus forces (Eastern Europe).
DocumentedHistoryGeography: Eastern EuropePeriod: 1380
Common questions
Is 1380 a prime number?
No, 1380 is not prime.
What are the factors of 1380?
The factors of 1380 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 690, 1380.
What is 1380 in Roman numerals?
1380 in Roman numerals is MCCCLXXX.
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