1090
UN 1090 is acetone.
- Even
- Composite
Where 1090 fits
Why 1090 is special
Its very low flash point is why a solvent sold openly in hardware shops is treated as a serious flammable liquid the moment it moves in bulk.
1090 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 5, 10, 109, 218, 545, 1090
- Prime factorisation
- 2 × 5 × 109
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 1090
- Binary
- 10001000010
- Octal
- 2102
- Hexadecimal
- 442
- Roman numeral
- MXC
- Scientific notation
- 1.090 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
- Harshad (Niven) number
Related numbers & connections
Ground radar interrogates on one frequency and aircraft reply on the other, which is what secondary radar is.
View 1030 →Technology & computing
Aircraft transponders reply to secondary radar on 1090 MHz, and ADS-B broadcasts position on the same frequency. Public receivers tracking flights are listening to this band.
DocumentedTechnology & computingGeography: International — ICAOPeriod: 1950s–UN 1090 identifies acetone as a flammable liquid with a flash point around minus 20 degrees Celsius. Small retail quantities are exempt from many requirements that apply in bulk.
DocumentedTechnology & computingGeography: International — UN model regulationsPeriod: 1956–
Common questions
Is 1090 a prime number?
No, 1090 is not prime.
What are the factors of 1090?
The factors of 1090 are 1, 2, 5, 10, 109, 218, 545, 1090.
What is 1090 in Roman numerals?
1090 in Roman numerals is MXC.
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: 3 August 2026