56487904 has 48 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 25548160.

The previous prime is 56487887. The next prime is 56487913. The reversal of 56487904 is 40978465.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134607 + ... + 135025.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^56487904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56487904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60963840).

56487904 is an abundant number, since it is smaller than the sum of its proper divisors (65439776).

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

56487904 is a wasteful number, since it uses less digits than its factorization.

56487904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 56487904 is about 7515.8435321659. The cubic root of 56487904 is about 383.6941285322.

The spelling of 56487904 in words is "fifty-six million, four hundred eighty-seven thousand, nine hundred four".