56391756 has 24 divisors (see below), whose sum is σ = 133546560. Its totient is φ = 18516432.

The previous prime is 56391739. The next prime is 56391763. The reversal of 56391756 is 65719365.

It is a happy number.

56391756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34266 + ... + 35873.

It is an arithmetic number, because the mean of its divisors is an integer number (5564440).

Almost surely, 2^56391756 is an apocalyptic number.

It is an amenable number.

56391756 is an abundant number, since it is smaller than the sum of its proper divisors (77154804).

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

56391756 is a wasteful number, since it uses less digits than its factorization.

56391756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70213 (or 70211 counting only the distinct ones).

The product of its digits is 170100, while the sum is 42.

The square root of 56391756 is about 7509.4444534866. Note that the first 4 decimals coincide. The cubic root of 56391756 is about 383.4763097827.

The spelling of 56391756 in words is "fifty-six million, three hundred ninety-one thousand, seven hundred fifty-six".