564001638 has 8 divisors (see below), whose sum is σ = 1128003288. Its totient is φ = 188000544.

The previous prime is 564001637. The next prime is 564001661. The reversal of 564001638 is 836100465.

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

564001638 is an admirable number.

564001638 is a modest number, since divided by 1638 gives 564 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 564001599 and 564001608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564001637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47000131 + ... + 47000142.

It is an arithmetic number, because the mean of its divisors is an integer number (141000411).

Almost surely, 2^564001638 is an apocalyptic number.

564001638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

564001638 is a wasteful number, since it uses less digits than its factorization.

564001638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94000278.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 564001638 is about 23748.7186601720. The cubic root of 564001638 is about 826.2157224121.

The spelling of 564001638 in words is "five hundred sixty-four million, one thousand, six hundred thirty-eight".