897666042 has 64 divisors (see below), whose sum is σ = 2216761344. Its totient is φ = 235984320.

The previous prime is 897665987. The next prime is 897666043. The reversal of 897666042 is 240666798.

It is a junction number, because it is equal to n+sod(n) for n = 897665982 and 897666000.

It is not an unprimeable number, because it can be changed into a prime (897666043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178243 + ... + 183209.

It is an arithmetic number, because the mean of its divisors is an integer number (34636896).

Almost surely, 2^897666042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897666042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108380672).

897666042 is an abundant number, since it is smaller than the sum of its proper divisors (1319095302).

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

897666042 is a wasteful number, since it uses less digits than its factorization.

897666042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 897666042 is about 29961.0754479875. The cubic root of 897666042 is about 964.6540651988.

The spelling of 897666042 in words is "eight hundred ninety-seven million, six hundred sixty-six thousand, forty-two".