1940
1940 is the year of the Battle of Britain.
- Even
- Composite
Where 1940 fits
Why 1940 is special
It was the first major campaign fought entirely by air forces. Radar and a centralised control system mattered more than aircraft quality: Britain could direct fighters to where bombers actually were rather than patrolling and hoping.
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940
- Prime factorisation
- 2^2 × 5 × 97
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 1940
- Binary
- 11110010100
- Octal
- 3624
- Hexadecimal
- 794
- Roman numeral
- MCMXL
- Scientific notation
- 1.940 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
Radar was demonstrated in Britain in 1935 and was decisive in the Battle of Britain five years later, because it let fighters be sent where bombers actually were.
View 1935 →Other connections
- is associated with1935
why?
Strength 0.50, confidence "high".
History
The Battle of Britain was the first campaign fought entirely between air forces. Radar feeding a centralised control room was decisive: fighters could be sent where bombers actually were rather than flying patrols and hoping to meet them.
DocumentedHistoryGeography: United KingdomPeriod: 1940
Common questions
Is 1940 a prime number?
No, 1940 is not prime.
What are the factors of 1940?
The factors of 1940 are 1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940.
What is 1940 in Roman numerals?
1940 in Roman numerals is MCMXL.
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