989974144 has 32 divisors (see below), whose sum is σ = 1987776000. Its totient is φ = 491081472.

The previous prime is 989974123. The next prime is 989974159. The reversal of 989974144 is 441479989.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14194 + ... + 46705.

It is an arithmetic number, because the mean of its divisors is an integer number (62118000).

Almost surely, 2^989974144 is an apocalyptic number.

It is an amenable number.

989974144 is an abundant number, since it is smaller than the sum of its proper divisors (997801856).

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

989974144 is a wasteful number, since it uses less digits than its factorization.

989974144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61040 (or 61028 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 989974144 is about 31463.8545636100. The cubic root of 989974144 is about 996.6468167295.

The spelling of 989974144 in words is "nine hundred eighty-nine million, nine hundred seventy-four thousand, one hundred forty-four".