1858
1858 is the year of the Great Stink in London.
- Even
- Composite
Where 1858 fits
Why 1858 is special
Sewage in the Thames became unbearable in the summer heat, and parliament — sitting beside it — funded a sewer system within eighteen days. Public health investment followed discomfort to legislators rather than the death toll of earlier epidemics.
Same number, different meanings
How 1858 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Sewage in the Thames became unbearable in the summer heat, and parliament — sitting beside it — funded a sewer system within eighteen days. Public health investment followed discomfort to legislators rather than the death toll of earlier epidemics.
- History
In 1858, the 'Great Stink' in London prompted the construction of a modern sewer system (England).
- Law & regulation
Cholera epidemics had killed tens of thousands without producing a sewer system. The smell reaching the Palace of Westminster in 1858 produced funding in under three weeks, which is a well-documented illustration of whose discomfort moves policy.
1858 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 929, 1858
- Prime factorisation
- 2 × 929
- Digit sum
- 22
- Digital root
- 4
Representations
- Decimal
- 1858
- Scientific notation
- 1.858 × 10^3
Roman numerals
M D C C C L V I I I
Binary
1 1 1 0 1 0 0 0 0 1 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,858
Octal
3 5 0 2
3 × 512 + 5 × 64 + 0 × 8 + 2 × 1 = 1,858
Hexadecimal
7 4 2
7 × 256 + 4 × 16 + 2 × 1 = 1,858
Read as powers of two: 1,024 + 512 + 256 + 64 + 2 = 1,858.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 5 hobbles, 8 strokes
1 × 1,000 + 8 × 100 + 5 × 10 + 8 × 1 = 1,858. 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), 5 corner wedges + 8 vertical wedges (units place)
30 × 60 + 58 = 1858. 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
- Semiprime
Related numbers & connections
1858 is a year in the 19th century, in the 1850s.
John Snow showed cholera was waterborne in 1854 and was largely ignored; the smell of the Thames reaching parliament in 1858 produced a funded sewer system within eighteen days.
View 1854 →History
In 1858, the 'Great Stink' in London prompted the construction of a modern sewer system (England).
DocumentedHistoryGeography: EnglandPeriod: 1858
Law & regulation
Cholera epidemics had killed tens of thousands without producing a sewer system. The smell reaching the Palace of Westminster in 1858 produced funding in under three weeks, which is a well-documented illustration of whose discomfort moves policy.
DocumentedLaw & regulationGeography: London, EnglandPeriod: 1858
Common questions
Is 1858 a prime number?
No, 1858 is not prime.
What are the factors of 1858?
The factors of 1858 are 1, 2, 929, 1858.
What is 1858 in Roman numerals?
1858 in Roman numerals is MDCCCLVIII.
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