897420664 has 64 divisors (see below), whose sum is σ = 1978986240. Its totient is φ = 373524480.

The previous prime is 897420659. The next prime is 897420677. The reversal of 897420664 is 466024798.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463779 + ... + 465709.

It is an arithmetic number, because the mean of its divisors is an integer number (30921660).

Almost surely, 2^897420664 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 897420664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989493120).

897420664 is an abundant number, since it is smaller than the sum of its proper divisors (1081565576).

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

897420664 is a wasteful number, since it uses less digits than its factorization.

897420664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 897420664 is about 29956.9802216445. The cubic root of 897420664 is about 964.5661607721.

The spelling of 897420664 in words is "eight hundred ninety-seven million, four hundred twenty thousand, six hundred sixty-four".