56728438 has 16 divisors (see below), whose sum is σ = 93771216. Its totient is φ = 25572960.

The previous prime is 56728429. The next prime is 56728453. The reversal of 56728438 is 83482765.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 56728394 and 56728403.

It is a congruent number.

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, 24253 + ... + 26488.

It is an arithmetic number, because the mean of its divisors is an integer number (5860701).

Almost surely, 2^56728438 is an apocalyptic number.

56728438 is a deficient number, since it is larger than the sum of its proper divisors (37042778).

56728438 is a wasteful number, since it uses less digits than its factorization.

56728438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50799.

The product of its digits is 322560, while the sum is 43.

The square root of 56728438 is about 7531.8283304919. The cubic root of 56728438 is about 384.2379664691.

The spelling of 56728438 in words is "fifty-six million, seven hundred twenty-eight thousand, four hundred thirty-eight".