564138858 has 16 divisors (see below), whose sum is σ = 1146774816. Its totient is φ = 184963440.

The previous prime is 564138851. The next prime is 564138893. The reversal of 564138858 is 858831465.

It is a super-2 number, since 2×564138858² = 636505302211088328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (564138851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770316 + ... + 771047.

It is an arithmetic number, because the mean of its divisors is an integer number (71673426).

Almost surely, 2^564138858 is an apocalyptic number.

564138858 is an abundant number, since it is smaller than the sum of its proper divisors (582635958).

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

564138858 is a wasteful number, since it uses less digits than its factorization.

564138858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541429.

The product of its digits is 921600, while the sum is 48.

The square root of 564138858 is about 23751.6074824421. The cubic root of 564138858 is about 826.2827222933.

The spelling of 564138858 in words is "five hundred sixty-four million, one hundred thirty-eight thousand, eight hundred fifty-eight".