1826
1826 is the year of the oldest surviving photograph.
- Even
- Composite
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.
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
- Binary
- 11100100010
- Octal
- 3442
- Hexadecimal
- 722
- Roman numeral
- MDCCCXXVI
- Scientific notation
- 1.826 × 10^3
Other mathematical patterns
- Deficient number
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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026