989645552 has 80 divisors (see below), whose sum is σ = 2354016000. Its totient is φ = 401768640.

The previous prime is 989645539. The next prime is 989645567. The reversal of 989645552 is 255546989.

It is a junction number, because it is equal to n+sod(n) for n = 989645494 and 989645503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99527 + ... + 109017.

It is an arithmetic number, because the mean of its divisors is an integer number (29425200).

Almost surely, 2^989645552 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 989645552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177008000).

989645552 is an abundant number, since it is smaller than the sum of its proper divisors (1364370448).

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

989645552 is a wasteful number, since it uses less digits than its factorization.

989645552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539 (or 9519 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 53.

The square root of 989645552 is about 31458.6323923975. The cubic root of 989645552 is about 996.5365355964.

The spelling of 989645552 in words is "nine hundred eighty-nine million, six hundred forty-five thousand, five hundred fifty-two".