56573136 has 60 divisors (see below), whose sum is σ = 159588000. Its totient is φ = 18707520.

The previous prime is 56573131. The next prime is 56573137. The reversal of 56573136 is 63137565.

It is a happy number.

56573136 is a `hidden beast` number, since 56 + 573 + 1 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 56573136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56573131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17365 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (2659800).

Almost surely, 2^56573136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56573136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79794000).

56573136 is an abundant number, since it is smaller than the sum of its proper divisors (103014864).

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

56573136 is a wasteful number, since it uses less digits than its factorization.

56573136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144 (or 3135 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 56573136 is about 7521.5115502138. The cubic root of 56573136 is about 383.8870110280.

The spelling of 56573136 in words is "fifty-six million, five hundred seventy-three thousand, one hundred thirty-six".