1816
1816 is the year without a summer.
- Even
- Composite
Where 1816 fits
Why 1816 is special
The eruption of Tambora the previous year cooled the northern hemisphere enough to cause crop failure and famine. The same weather kept Mary Shelley indoors in Switzerland, where she wrote Frankenstein.
Same number, different meanings
How 1816 is understood across different contexts — never implying one meaning because of another.
- Mathematics
The eruption of Tambora the previous year cooled the northern hemisphere enough to cause crop failure and famine. The same weather kept Mary Shelley indoors in Switzerland, where she wrote Frankenstein.
- History
In 1816, the 'year without a summer' followed the Tambora eruption, causing crop failure across the northern hemisphere.
- Science
Tambora's 1815 eruption cooled the globe enough to fail harvests across the northern hemisphere in 1816. The unrelenting rain that summer also kept a party of writers indoors by Lake Geneva, which is how Frankenstein was written.
1816 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 4, 8, 227, 454, 908, 1816
- Prime factorisation
- 2^3 × 227
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 1816
- Scientific notation
- 1.816 × 10^3
Roman numerals
M D C C C X V I
Binary
1 1 1 0 0 0 1 1 0 0 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 1,816
Octal
3 4 3 0
3 × 512 + 4 × 64 + 3 × 8 + 0 × 1 = 1,816
Hexadecimal
7 1 8
7 × 256 + 1 × 16 + 8 × 1 = 1,816
Read as powers of two: 1,024 + 512 + 256 + 16 + 8 = 1,816.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 1 hobble, 6 strokes
1 × 1,000 + 8 × 100 + 1 × 10 + 6 × 1 = 1,816. 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), 1 corner wedge + 6 vertical wedges (units place)
30 × 60 + 16 = 1816. 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
1816 is a year in the 19th century, in the 1810s.
The weather that failed harvests across the northern hemisphere in 1816 also kept a party indoors by Lake Geneva, where Frankenstein was written and published two years later.
View 1818 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- developed from1818
why?
Strength 0.50, confidence "high".
History
In 1816, the 'year without a summer' followed the Tambora eruption, causing crop failure across the northern hemisphere.
DocumentedHistoryGeography: globalPeriod: 1816
Science
Tambora's 1815 eruption cooled the globe enough to fail harvests across the northern hemisphere in 1816. The unrelenting rain that summer also kept a party of writers indoors by Lake Geneva, which is how Frankenstein was written.
DocumentedSciencePeriod: 1816
Common questions
Is 1816 a prime number?
No, 1816 is not prime.
What are the factors of 1816?
The factors of 1816 are 1, 2, 4, 8, 227, 454, 908, 1816.
What is 1816 in Roman numerals?
1816 in Roman numerals is MDCCCXVI.
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