564638389 has 8 divisors (see below), whose sum is σ = 662741888. Its totient is φ = 470895120.

The previous prime is 564638353. The next prime is 564638407. The reversal of 564638389 is 983836465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 564638389 - 2¹¹ = 564636341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564638329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089777 + ... + 1090294.

It is an arithmetic number, because the mean of its divisors is an integer number (82842736).

Almost surely, 2^564638389 is an apocalyptic number.

It is an amenable number.

564638389 is a deficient number, since it is larger than the sum of its proper divisors (98103499).

564638389 is a wasteful number, since it uses less digits than its factorization.

564638389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180115.

The product of its digits is 3732480, while the sum is 52.

The square root of 564638389 is about 23762.1208859815. The cubic root of 564638389 is about 826.5265346460.

The spelling of 564638389 in words is "five hundred sixty-four million, six hundred thirty-eight thousand, three hundred eighty-nine".