897581568 has 160 divisors (see below), whose sum is σ = 2612332800. Its totient is φ = 272203776.

The previous prime is 897581567. The next prime is 897581593. The reversal of 897581568 is 865185798.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (897581567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1577188 + ... + 1577756.

It is an arithmetic number, because the mean of its divisors is an integer number (16327080).

Almost surely, 2^897581568 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 897581568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306166400).

897581568 is an abundant number, since it is smaller than the sum of its proper divisors (1714751232).

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

897581568 is a wasteful number, since it uses less digits than its factorization.

897581568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 666 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 57.

The square root of 897581568 is about 29959.6656857182. The cubic root of 897581568 is about 964.6238049684.

The spelling of 897581568 in words is "eight hundred ninety-seven million, five hundred eighty-one thousand, five hundred sixty-eight".