564881382 has 48 divisors (see below), whose sum is σ = 1330208880. Its totient is φ = 172207296.

The previous prime is 564881371. The next prime is 564881417. The reversal of 564881382 is 283188465.

564881382 is a `hidden beast` number, since 564 + 8 + 8 + 1 + 3 + 82 = 666.

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 23 ways as a sum of consecutive naturals, for example, 14433 + ... + 36579.

It is an arithmetic number, because the mean of its divisors is an integer number (27712685).

Almost surely, 2^564881382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 564881382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665104440).

564881382 is an abundant number, since it is smaller than the sum of its proper divisors (765327498).

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

564881382 is a wasteful number, since it uses less digits than its factorization.

564881382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22277 (or 22274 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 564881382 is about 23767.2333686527. The cubic root of 564881382 is about 826.6450832973.

The spelling of 564881382 in words is "five hundred sixty-four million, eight hundred eighty-one thousand, three hundred eighty-two".