56690538 has 16 divisors (see below), whose sum is σ = 118310976. Its totient is φ = 18075200.

The previous prime is 56690503. The next prime is 56690539. The reversal of 56690538 is 83509665.

It is a self number, because there is not a number n which added to its sum of digits gives 56690538.

It is not an unprimeable number, because it can be changed into a prime (56690539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205263 + ... + 205538.

It is an arithmetic number, because the mean of its divisors is an integer number (7394436).

Almost surely, 2^56690538 is an apocalyptic number.

56690538 is an abundant number, since it is smaller than the sum of its proper divisors (61620438).

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

56690538 is a wasteful number, since it uses less digits than its factorization.

56690538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410829.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 56690538 is about 7529.3119207534. The cubic root of 56690538 is about 384.1523782191.

The spelling of 56690538 in words is "fifty-six million, six hundred ninety thousand, five hundred thirty-eight".