27
27 is a perfect cube (3³), the atomic number of cobalt, and the number of unit cubes making up a Rubik's Cube.
Where 27 fits
Why 27 is special
27's mathematical identity as a perfect cube is echoed physically: a Rubik's Cube really is built from a 3×3×3 arrangement of 27 smaller cubes.
Same number, different meanings
How 27 is understood across different contexts — never implying one meaning because of another.
- Mathematics
27's mathematical identity as a perfect cube is echoed physically: a Rubik's Cube really is built from a 3×3×3 arrangement of 27 smaller cubes.
- Science
27 is the atomic number of cobalt.
- Media & popular culture
A Rubik's Cube is physically built from 27 unit cubes arranged 3×3×3 (26 visible on the surface, one hidden at the centre).
Factors & digit properties
- Divisors (4)
- 1, 3, 9, 27
- Prime factorisation
- 3^3
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 27
- Binary
- 11011
- Octal
- 33
- Hexadecimal
- 1b
- Roman numeral
- XXVII
- Scientific notation
- 2.700 × 10^1
Other mathematical patterns
- Deficient number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
27 is the cube of 3 (3³ = 27).
View 3 →Science
27 is the atomic number of cobalt.
DocumentedScience
Media & popular culture
A Rubik's Cube is physically built from 27 unit cubes arranged 3×3×3 (26 visible on the surface, one hidden at the centre).
DocumentedMedia & popular culture
Common questions
Is 27 a prime number?
No, 27 is not prime.
What are the factors of 27?
The factors of 27 are 1, 3, 9, 27.
What is 27 in Roman numerals?
27 in Roman numerals is XXVII.
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: 15 July 2026