564231388 has 30 divisors (see below), whose sum is σ = 1145560696. Its totient is φ = 238204296.

The previous prime is 564231373. The next prime is 564231397. The reversal of 564231388 is 883132465.

564231388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 564231388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8421331 + ... + 8421397.

Almost surely, 2^564231388 is an apocalyptic number.

It is an amenable number.

564231388 is an abundant number, since it is smaller than the sum of its proper divisors (581329308).

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

564231388 is an frugal number, since it uses more digits than its factorization.

564231388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 76 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 564231388 is about 23753.5552707379. Note that the first 3 decimals coincide. The cubic root of 564231388 is about 826.3278954272.

The spelling of 564231388 in words is "five hundred sixty-four million, two hundred thirty-one thousand, three hundred eighty-eight".