989874564 has 48 divisors (see below), whose sum is σ = 2649994368. Its totient is φ = 281714688.

The previous prime is 989874563. The next prime is 989874581. The reversal of 989874564 is 465478989.

It is a junction number, because it is equal to n+sod(n) for n = 989874498 and 989874507.

It is not an unprimeable number, because it can be changed into a prime (989874563) 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, 1339 + ... + 44514.

It is an arithmetic number, because the mean of its divisors is an integer number (55208216).

Almost surely, 2^989874564 is an apocalyptic number.

It is an amenable number.

989874564 is an abundant number, since it is smaller than the sum of its proper divisors (1660119804).

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

989874564 is a wasteful number, since it uses less digits than its factorization.

989874564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46124 (or 46122 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 989874564 is about 31462.2720730719. The cubic root of 989874564 is about 996.6133985443.

The spelling of 989874564 in words is "nine hundred eighty-nine million, eight hundred seventy-four thousand, five hundred sixty-four".