56569380 has 72 divisors (see below), whose sum is σ = 181516608. Its totient is φ = 12894912.

The previous prime is 56569369. The next prime is 56569417. The reversal of 56569380 is 8396565.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153957 + ... + 154323.

It is an arithmetic number, because the mean of its divisors is an integer number (2521064).

Almost surely, 2^56569380 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 56569380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90758304).

56569380 is an abundant number, since it is smaller than the sum of its proper divisors (124947228).

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

56569380 is a wasteful number, since it uses less digits than its factorization.

56569380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 384 counting only the distinct ones).

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

The square root of 56569380 is about 7521.2618622143. The cubic root of 56569380 is about 383.8785151727.

The spelling of 56569380 in words is "fifty-six million, five hundred sixty-nine thousand, three hundred eighty".