1398
1398 is a year in the 14th century. Timur sacked Delhi, and the sultanate never fully recovered (South Asia).
- Even
- Composite
Where 1398 fits
Why 1398 is special
1398 has a profile because of what happened in it rather than because of any property of the number: Timur sacked Delhi, and the sultanate never fully recovered (South Asia).
1398 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 3, 6, 233, 466, 699, 1398
- Prime factorisation
- 2 × 3 × 233
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1398
- Scientific notation
- 1.398 × 10^3
Roman numerals
M C C C X C V I I I
MCCCXCVIII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 0 1 0 1 1 1 0 1 1 0
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 1,398
Octal
2 5 6 6
2 × 512 + 5 × 64 + 6 × 8 + 6 × 1 = 1,398
Hexadecimal
5 7 6
5 × 256 + 7 × 16 + 6 × 1 = 1,398
Read as powers of two: 1,024 + 256 + 64 + 32 + 16 + 4 + 2 = 1,398.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 9 hobbles, 8 strokes
1 × 1,000 + 3 × 100 + 9 × 10 + 8 × 1 = 1,398. 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), 1 corner wedge + 8 vertical wedges (units place)
23 × 60 + 18 = 1398. 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
1398 is a year in the 14th century, in the 1390s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1398, Timur sacked Delhi, and the sultanate never fully recovered (South Asia).
DocumentedHistoryGeography: South AsiaPeriod: 1398
Common questions
Is 1398 a prime number?
No, 1398 is not prime.
What are the factors of 1398?
The factors of 1398 are 1, 2, 3, 6, 233, 466, 699, 1398.
What is 1398 in Roman numerals?
1398 in Roman numerals is MCCCXCVIII. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MCCCLXXXXVIII, 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