56597820 has 48 divisors (see below), whose sum is σ = 159548928. Its totient is φ = 14990400.

The previous prime is 56597819. The next prime is 56597833. The reversal of 56597820 is 2879565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5937 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (3323936).

Almost surely, 2^56597820 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 56597820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79774464).

56597820 is an abundant number, since it is smaller than the sum of its proper divisors (102951108).

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

56597820 is a wasteful number, since it uses less digits than its factorization.

56597820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 56597820 is about 7523.1522648422. The cubic root of 56597820 is about 383.9428354576.

The spelling of 56597820 in words is "fifty-six million, five hundred ninety-seven thousand, eight hundred twenty".