26 (number)


26 is the natural number following 25 and preceding 27.

In mathematics

26 is the only integer that is one greater than a square and one less than a cube.
A rhombicuboctahedron has twenty-six faces.
When a 3 × 3 × 3 cube is made of twenty-seven unit cubes, twenty-six of them are viewable as the exterior layer.
There are 26 sporadic groups.
The 26-dimensional Lorentzian unimodular lattice II25,1 plays a significant role in sphere packing problems and the classification of finite simple groups. In particular, the Leech lattice is obtained in a simple way as a subquotient.

Properties of its positional representation in certain radixes

Twenty-six is a repdigit in base three and in base twelve.
In base ten, 26 is the smallest number that is not a palindrome to have a square that is a palindrome.

In science

Twenty-six is: