564897840 has 160 divisors (see below), whose sum is σ = 1895045376. Its totient is φ = 138378240.

The previous prime is 564897829. The next prime is 564897869. The reversal of 564897840 is 48798465.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1032447 + ... + 1032993.

Almost surely, 2^564897840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 564897840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (947522688).

564897840 is an abundant number, since it is smaller than the sum of its proper divisors (1330147536).

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

564897840 is a wasteful number, since it uses less digits than its factorization.

564897840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 564897840 is about 23767.5795991094. The cubic root of 564897840 is about 826.6531114091.

The spelling of 564897840 in words is "five hundred sixty-four million, eight hundred ninety-seven thousand, eight hundred forty".