1804
1804 is the year Haiti became the first state founded by a successful slave revolt.
- Even
- Composite
Where 1804 fits
Why 1804 is special
Napoleon also crowned himself emperor in 1804, and the two events are connected: the French expedition sent to retake Saint-Domingue was destroyed by resistance and yellow fever, and its failure is part of why France sold Louisiana to the United States the year before.
Same number, different meanings
How 1804 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Napoleon also crowned himself emperor in 1804, and the two events are connected: the French expedition sent to retake Saint-Domingue was destroyed by resistance and yellow fever, and its failure is part of why France sold Louisiana to the United States the year before.
- History
Haiti became the first state established by a successful revolt of enslaved people in 1804. The French expedition sent to retake the colony was destroyed by resistance and yellow fever, and that failure is part of why France sold Louisiana to the United States the previous year.
- Science
In 1804, John Dalton set out his atomic theory, and Richard Trevithick ran the first steam locomotive on rails (England).
1804 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 1804
- Prime factorisation
- 2^2 × 11 × 41
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1804
- Scientific notation
- 1.804 × 10^3
Roman numerals
M D C C C I V
MDCCCIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 1 1 0 0 0 0 1 1 0 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,804
Octal
3 4 1 4
3 × 512 + 4 × 64 + 1 × 8 + 4 × 1 = 1,804
Hexadecimal
7 0 c
7 × 256 + 0 × 16 + c × 1 = 1,804
Read as powers of two: 1,024 + 512 + 256 + 8 + 4 = 1,804.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 4 strokes
1 × 1,000 + 8 × 100 + 4 × 1 = 1,804. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges (sixties place), 4 vertical wedges (units place)
30 × 60 + 4 = 1804. 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
- Deficient number
Related numbers & connections
1804 is a year in the 19th century, in the 1800s.
France declared a republic in 1792 and Haiti, fighting France, became a state founded by a successful slave revolt in 1804 — invoking the same principles against the country that proclaimed them.
View 1792 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
Haiti became the first state established by a successful revolt of enslaved people in 1804. The French expedition sent to retake the colony was destroyed by resistance and yellow fever, and that failure is part of why France sold Louisiana to the United States the previous year.
DocumentedHistoryGeography: Haiti and FrancePeriod: 1804
Science
In 1804, John Dalton set out his atomic theory, and Richard Trevithick ran the first steam locomotive on rails (England).
DocumentedScienceGeography: EnglandPeriod: 1804
Common questions
Is 1804 a prime number?
No, 1804 is not prime.
What are the factors of 1804?
The factors of 1804 are 1, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 1804.
What is 1804 in Roman numerals?
1804 in Roman numerals is MDCCCIV. IV is subtractive: one before five — five minus one. Written additively it would be MDCCCIIII, 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026