56817904 has 80 divisors (see below), whose sum is σ = 136241280. Its totient is φ = 22567680.

The previous prime is 56817881. The next prime is 56817907. The reversal of 56817904 is 40971865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56817907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42819 + ... + 44125.

It is an arithmetic number, because the mean of its divisors is an integer number (1703016).

Almost surely, 2^56817904 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 56817904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68120640).

56817904 is an abundant number, since it is smaller than the sum of its proper divisors (79423376).

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

56817904 is a wasteful number, since it uses less digits than its factorization.

56817904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 56817904 is about 7537.7651860482. The cubic root of 56817904 is about 384.4398533266.

The spelling of 56817904 in words is "fifty-six million, eight hundred seventeen thousand, nine hundred four".