Interesting facts of maths

There are just four numbers (after 1 ) which are the sum of the cubes of their digits :

    153 = 1^3 + 5^3 + 3^3
     370 = 3^3 + 7^3 + 0^3
     371 = 3^3 + 7^3 + 1^3
     407 = 4^3 + 0^3 + 7^3