140
E140 is chlorophyll, the colour taken from plants.
- Even
- Composite
Where 140 fits
Why 140 is special
It is unstable to heat and acid, which is why a naturally green product fades and why the copper complex version exists.
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
- Prime factorisation
- 2^2 × 5 × 7
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 140
- Binary
- 10001100
- Octal
- 214
- Hexadecimal
- 8c
- Roman numeral
- CXL
- Scientific notation
- 1.400 × 10^2
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Replacing the central magnesium with copper is what makes the plant-derived green stable enough to use.
View 141 →Everyday life
E140 chlorophylls and chlorophyllins are extracted from plant material. Their instability to heat and acidity limits their use, addressed by the copper complexes of E141.
DocumentedEveryday lifeGeography: European Union and states adopting the E number systemPeriod: 1962–
Common questions
Is 140 a prime number?
No, 140 is not prime.
What are the factors of 140?
The factors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140.
What is 140 in Roman numerals?
140 in Roman numerals is CXL.
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