56817428 has 12 divisors (see below), whose sum is σ = 100360512. Its totient is φ = 28143000.

The previous prime is 56817421. The next prime is 56817457. The reversal of 56817428 is 82471865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56817421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65948 + ... + 66803.

It is an arithmetic number, because the mean of its divisors is an integer number (8363376).

Almost surely, 2^56817428 is an apocalyptic number.

It is an amenable number.

56817428 is a deficient number, since it is larger than the sum of its proper divisors (43543084).

56817428 is a wasteful number, since it uses less digits than its factorization.

56817428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132862 (or 132860 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 56817428 is about 7537.7336116369. The cubic root of 56817428 is about 384.4387797572.

The spelling of 56817428 in words is "fifty-six million, eight hundred seventeen thousand, four hundred twenty-eight".