56821604 has 24 divisors (see below), whose sum is σ = 113805888. Its totient is φ = 24317280.

The previous prime is 56821579. The next prime is 56821627. The reversal of 56821604 is 40612865.

It is a super-2 number, since 2×56821604² = 6457389362265632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31922 + ... + 33654.

It is an arithmetic number, because the mean of its divisors is an integer number (4741912).

Almost surely, 2^56821604 is an apocalyptic number.

It is an amenable number.

56821604 is an abundant number, since it is smaller than the sum of its proper divisors (56984284).

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

56821604 is a wasteful number, since it uses less digits than its factorization.

56821604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 56821604 is about 7538.0106128872. The cubic root of 56821604 is about 384.4481980940.

The spelling of 56821604 in words is "fifty-six million, eight hundred twenty-one thousand, six hundred four".