56015904 has 48 divisors (see below), whose sum is σ = 168049728. Its totient is φ = 16004352.

The previous prime is 56015903. The next prime is 56015909. The reversal of 56015904 is 40951065.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (56015903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41007 + ... + 42350.

It is an arithmetic number, because the mean of its divisors is an integer number (3501036).

Almost surely, 2^56015904 is an apocalyptic number.

It is an amenable number.

56015904 is an abundant number, since it is smaller than the sum of its proper divisors (112033824).

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

56015904 is a wasteful number, since it uses less digits than its factorization.

56015904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83377 (or 83369 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 56015904 is about 7484.3773288097. The cubic root of 56015904 is about 382.6224512901.

Adding to 56015904 its reverse (40951065), we get a palindrome (96966969).

The spelling of 56015904 in words is "fifty-six million, fifteen thousand, nine hundred four".