897565578 has 32 divisors (see below), whose sum is σ = 2209393536. Its totient is φ = 236720448.

The previous prime is 897565523. The next prime is 897565579. The reversal of 897565578 is 875565798.

It is not an unprimeable number, because it can be changed into a prime (897565579) 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, 821401 + ... + 822492.

It is an arithmetic number, because the mean of its divisors is an integer number (69043548).

Almost surely, 2^897565578 is an apocalyptic number.

897565578 is an abundant number, since it is smaller than the sum of its proper divisors (1311827958).

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

897565578 is a wasteful number, since it uses less digits than its factorization.

897565578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643918.

The product of its digits is 21168000, while the sum is 60.

The square root of 897565578 is about 29959.3988257442. The cubic root of 897565578 is about 964.6180768256.

The spelling of 897565578 in words is "eight hundred ninety-seven million, five hundred sixty-five thousand, five hundred seventy-eight".