1836
1836 is the year of the Battle of the Alamo.
- Even
- Composite
Where 1836 fits
Why 1836 is special
The defenders were killed after a thirteen-day siege. The Texian revolt was substantially about Mexico's abolition of slavery, which the American settlers in Texas were determined to preserve — a motive largely absent from the popular account.
1836 connects to:
- historical years — appears in
- numbers in physics — appears in
- 1833 — is associated with
Same number, different meanings
How 1836 is understood across different contexts — never implying one meaning because of another.
- Mathematics
The defenders were killed after a thirteen-day siege. The Texian revolt was substantially about Mexico's abolition of slavery, which the American settlers in Texas were determined to preserve — a motive largely absent from the popular account.
- History
Mexico had abolished slavery in 1829 and American settlers in Texas resisted the prohibition. That grievance is well documented in the revolt's own records and is largely absent from the Alamo as popularly retold.
- Technology & computing
In 1836, Samuel Colt patented the revolving-cylinder firearm (United States).
- Science
The ratio of the proton's mass to the electron's is about 1836 (worldwide, physics). 1836.15. Like the fine-structure constant it is a pure number with no units, and measurements of distant quasars are used to test whether it has changed over cosmic time. So far it has not.
1836 is part of
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 51, 54, 68, 102, 108, 153, 204, 306, 459, 612, 918, 1836
- Prime factorisation
- 2^2 × 3^3 × 17
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 1836
- Scientific notation
- 1.836 × 10^3
Roman numerals
M D C C C X X X V I
Binary
1 1 1 0 0 1 0 1 1 0 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,836
Octal
3 4 5 4
3 × 512 + 4 × 64 + 5 × 8 + 4 × 1 = 1,836
Hexadecimal
7 2 c
7 × 256 + 2 × 16 + c × 1 = 1,836
Read as powers of two: 1,024 + 512 + 256 + 32 + 8 + 4 = 1,836.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 3 hobbles, 6 strokes
1 × 1,000 + 8 × 100 + 3 × 10 + 6 × 1 = 1,836. 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), 3 corner wedges + 6 vertical wedges (units place)
30 × 60 + 36 = 1836. 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
- Harshad (Niven) number
Related numbers & connections
1836 is a year in the 19th century, in the 1830s.
The Texian revolt of 1836 was substantially about Mexico's abolition of slavery, seven years after Mexico ended it and three years after Britain legislated to.
View 1833 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
- appears inPhysics
why?
Strength 0.50, confidence "high".
Other connections
- is associated with1833
why?
Strength 0.50, confidence "high".
History
Mexico had abolished slavery in 1829 and American settlers in Texas resisted the prohibition. That grievance is well documented in the revolt's own records and is largely absent from the Alamo as popularly retold.
DocumentedHistoryGeography: TexasPeriod: 1836
Technology & computing
In 1836, Samuel Colt patented the revolving-cylinder firearm (United States).
DocumentedTechnology & computingGeography: United StatesPeriod: 1836
Science
The ratio of the proton's mass to the electron's is about 1836 (worldwide, physics). 1836.15. Like the fine-structure constant it is a pure number with no units, and measurements of distant quasars are used to test whether it has changed over cosmic time. So far it has not.
DocumentedScienceGeography: worldwide, physics
Common questions
Is 1836 a prime number?
No, 1836 is not prime.
What are the factors of 1836?
The factors of 1836 are 1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 51, 54, 68, 102, 108, 153, 204, 306, 459, 612, 918, 1836.
What is 1836 in Roman numerals?
1836 in Roman numerals is MDCCCXXXVI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 3 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026