56864538 has 32 divisors (see below), whose sum is σ = 127497600. Its totient is φ = 18785088.

The previous prime is 56864491. The next prime is 56864551. The reversal of 56864538 is 83546865.

56864538 is a `hidden beast` number, since 56 + 8 + 64 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 56864493 and 56864502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1443 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (3984300).

Almost surely, 2^56864538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56864538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63748800).

56864538 is an abundant number, since it is smaller than the sum of its proper divisors (70633062).

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

56864538 is a wasteful number, since it uses less digits than its factorization.

56864538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9443 (or 9437 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 56864538 is about 7540.8579087528. The cubic root of 56864538 is about 384.5450024916.

The spelling of 56864538 in words is "fifty-six million, eight hundred sixty-four thousand, five hundred thirty-eight".