989838388 has 48 divisors (see below), whose sum is σ = 2200431744. Its totient is φ = 378368640.

The previous prime is 989838361. The next prime is 989838391. The reversal of 989838388 is 883838989.

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, 13995 + ... + 46642.

It is an arithmetic number, because the mean of its divisors is an integer number (45842328).

Almost surely, 2^989838388 is an apocalyptic number.

It is an amenable number.

989838388 is an abundant number, since it is smaller than the sum of its proper divisors (1210593356).

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

989838388 is a wasteful number, since it uses less digits than its factorization.

989838388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60712 (or 60710 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 64.

The square root of 989838388 is about 31461.6971570194. The cubic root of 989838388 is about 996.6012576372.

The spelling of 989838388 in words is "nine hundred eighty-nine million, eight hundred thirty-eight thousand, three hundred eighty-eight".