56439828 has 30 divisors (see below), whose sum is σ = 147545706. Its totient is φ = 18813168.

The previous prime is 56439827. The next prime is 56439833. The reversal of 56439828 is 82893465.

56439828 is a `hidden beast` number, since 564 + 3 + 9 + 82 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49533444 + 6906384 = 7038^2 + 2628^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56439827) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 86775 + ... + 87422.

Almost surely, 2^56439828 is an apocalyptic number.

It is an amenable number.

56439828 is an abundant number, since it is smaller than the sum of its proper divisors (91105878).

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

56439828 is a wasteful number, since it uses less digits than its factorization.

56439828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174213 (or 174202 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 56439828 is about 7512.6445410388. The cubic root of 56439828 is about 383.5852455486.

The spelling of 56439828 in words is "fifty-six million, four hundred thirty-nine thousand, eight hundred twenty-eight".