1884
1884 is the year Greenwich was agreed as the prime meridian.
- Even
- Composite
Where 1884 fits
Why 1884 is special
Twenty-five nations voted; France abstained and kept Paris time for another quarter century. The same conference established the 24-hour universal day, which is why time zones exist in the form they do.
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 12, 157, 314, 471, 628, 942, 1884
- Prime factorisation
- 2^2 × 3 × 157
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1884
- Binary
- 11101011100
- Octal
- 3534
- Hexadecimal
- 75c
- Roman numeral
- MDCCCLXXXIV
- Scientific notation
- 1.884 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
Greenwich was chosen as the prime meridian in 1884 because the Royal Observatory founded there in 1675 had produced the navigational tables most of the world's shipping already used.
View 1675 →Geography
The 1884 conference chose Greenwich by a vote of 22 to 1 with two abstentions, France among them. A meridian is arbitrary by nature, so the choice was political, and France used Paris time until 1911.
DocumentedGeographyGeography: International — 25 participating statesPeriod: 1884
Common questions
Is 1884 a prime number?
No, 1884 is not prime.
What are the factors of 1884?
The factors of 1884 are 1, 2, 3, 4, 6, 12, 157, 314, 471, 628, 942, 1884.
What is 1884 in Roman numerals?
1884 in Roman numerals is MDCCCLXXXIV.
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