56391812 has 6 divisors (see below), whose sum is σ = 98685678. Its totient is φ = 28195904.

The previous prime is 56391793. The next prime is 56391827. The reversal of 56391812 is 21819365.

It can be written as a sum of positive squares in only one way, i.e., 56310016 + 81796 = 7504^2 + 286^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7048973 + ... + 7048980.

It is an arithmetic number, because the mean of its divisors is an integer number (16447613).

Almost surely, 2^56391812 is an apocalyptic number.

It is an amenable number.

56391812 is a deficient number, since it is larger than the sum of its proper divisors (42293866).

56391812 is a wasteful number, since it uses less digits than its factorization.

56391812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14097957 (or 14097955 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 56391812 is about 7509.4481821236. The cubic root of 56391812 is about 383.4764367201.

The spelling of 56391812 in words is "fifty-six million, three hundred ninety-one thousand, eight hundred twelve".