989744560 has 40 divisors (see below), whose sum is σ = 2629894176. Its totient is φ = 339340800.

The previous prime is 989744557. The next prime is 989744597. The reversal of 989744560 is 65447989.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 989744498 and 989744507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883141 + ... + 884260.

Almost surely, 2^989744560 is an apocalyptic number.

It is an amenable number.

989744560 is an abundant number, since it is smaller than the sum of its proper divisors (1640149616).

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

989744560 is a wasteful number, since it uses less digits than its factorization.

989744560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767421 (or 1767415 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 989744560 is about 31460.2059751681. The cubic root of 989744560 is about 996.5697669552.

The spelling of 989744560 in words is "nine hundred eighty-nine million, seven hundred forty-four thousand, five hundred sixty".