56520040 has 16 divisors (see below), whose sum is σ = 127170180. Its totient is φ = 22608000.

The previous prime is 56520029. The next prime is 56520067. The reversal of 56520040 is 4002565.

It can be written as a sum of positive squares in 2 ways, for example, as 51294244 + 5225796 = 7162^2 + 2286^2 .

It is a super-3 number, since 3×56520040³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56519993 and 56520020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706461 + ... + 706540.

Almost surely, 2^56520040 is an apocalyptic number.

It is an amenable number.

56520040 is an abundant number, since it is smaller than the sum of its proper divisors (70650140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56520040 is a wasteful number, since it uses less digits than its factorization.

56520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413012 (or 1413008 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 56520040 is about 7517.9811119741. The cubic root of 56520040 is about 383.7668760063.

The spelling of 56520040 in words is "fifty-six million, five hundred twenty thousand, forty".