56645538 has 8 divisors (see below), whose sum is σ = 113291088. Its totient is φ = 18881844.

The previous prime is 56645531. The next prime is 56645539. The reversal of 56645538 is 83554665.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

56645538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 56645538.

It is not an unprimeable number, because it can be changed into a prime (56645531) 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, 4720456 + ... + 4720467.

It is an arithmetic number, because the mean of its divisors is an integer number (14161386).

Almost surely, 2^56645538 is an apocalyptic number.

56645538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56645538 is a wasteful number, since it uses less digits than its factorization.

56645538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440928.

The product of its digits is 432000, while the sum is 42.

The square root of 56645538 is about 7526.3230066215. The cubic root of 56645538 is about 384.0507067371.

The spelling of 56645538 in words is "fifty-six million, six hundred forty-five thousand, five hundred thirty-eight".