897427664 has 40 divisors (see below), whose sum is σ = 1992878400. Its totient is φ = 383505408.

The previous prime is 897427621. The next prime is 897427667. The reversal of 897427664 is 466724798.

It is a super-2 number, since 2×897427664² = 1610752824224993792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897427667) 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, 28187 + ... + 50885.

It is an arithmetic number, because the mean of its divisors is an integer number (49821960).

Almost surely, 2^897427664 is an apocalyptic number.

It is an amenable number.

897427664 is an abundant number, since it is smaller than the sum of its proper divisors (1095450736).

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

897427664 is a wasteful number, since it uses less digits than its factorization.

897427664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23067 (or 23061 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 53.

The square root of 897427664 is about 29957.0970556227. The cubic root of 897427664 is about 964.5686686802.

The spelling of 897427664 in words is "eight hundred ninety-seven million, four hundred twenty-seven thousand, six hundred sixty-four".