989387844 has 24 divisors (see below), whose sum is σ = 2370966528. Its totient is φ = 320882400.

The previous prime is 989387843. The next prime is 989387873. The reversal of 989387844 is 448783989.

It is not an unprimeable number, because it can be changed into a prime (989387843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113732 + ... + 1114619.

It is an arithmetic number, because the mean of its divisors is an integer number (98790272).

Almost surely, 2^989387844 is an apocalyptic number.

It is an amenable number.

989387844 is an abundant number, since it is smaller than the sum of its proper divisors (1381578684).

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

989387844 is a wasteful number, since it uses less digits than its factorization.

989387844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228395 (or 2228393 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The square root of 989387844 is about 31454.5361434563. The cubic root of 989387844 is about 996.4500272729.

The spelling of 989387844 in words is "nine hundred eighty-nine million, three hundred eighty-seven thousand, eight hundred forty-four".