1826
1826 is the year of the oldest surviving photograph.
- Even
- Composite
Where 1826 fits
Why 1826 is special
Niépce's view from a window required an exposure of at least eight hours, which is why the sunlight appears to fall on both sides of the courtyard. The image records a whole day rather than a moment.
Same number, different meanings
How 1826 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Niépce's view from a window required an exposure of at least eight hours, which is why the sunlight appears to fall on both sides of the courtyard. The image records a whole day rather than a moment.
- Technology & computing
In 1826, Nicéphore Niépce made the earliest surviving photograph, an eight-hour exposure from a window (France).
- Media & popular culture
The earliest surviving photograph took at least eight hours to expose, so the sun moved across the sky during it and lit both sides of the buildings. Photography began by recording duration rather than an instant.
1826 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 11, 22, 83, 166, 913, 1826
- Prime factorisation
- 2 × 11 × 83
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 1826
- Scientific notation
- 1.826 × 10^3
Roman numerals
M D C C C X X V I
Binary
1 1 1 0 0 1 0 0 0 1 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,826
Octal
3 4 4 2
3 × 512 + 4 × 64 + 4 × 8 + 2 × 1 = 1,826
Hexadecimal
7 2 2
7 × 256 + 2 × 16 + 2 × 1 = 1,826
Read as powers of two: 1,024 + 512 + 256 + 32 + 2 = 1,826.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 2 hobbles, 6 strokes
1 × 1,000 + 8 × 100 + 2 × 10 + 6 × 1 = 1,826. 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), 2 corner wedges + 6 vertical wedges (units place)
30 × 60 + 26 = 1826. 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
1826 is a year in the 19th century, in the 1820s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Technology & computing
In 1826, Nicéphore Niépce made the earliest surviving photograph, an eight-hour exposure from a window (France).
DocumentedTechnology & computingGeography: FrancePeriod: 1826
Media & popular culture
The earliest surviving photograph took at least eight hours to expose, so the sun moved across the sky during it and lit both sides of the buildings. Photography began by recording duration rather than an instant.
DocumentedMedia & popular cultureGeography: FrancePeriod: 1826
Common questions
Is 1826 a prime number?
No, 1826 is not prime.
What are the factors of 1826?
The factors of 1826 are 1, 2, 11, 22, 83, 166, 913, 1826.
What is 1826 in Roman numerals?
1826 in Roman numerals is MDCCCXXVI.
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