989388128 has 48 divisors (see below), whose sum is σ = 2021740560. Its totient is φ = 476044800.

The previous prime is 989388119. The next prime is 989388131. The reversal of 989388128 is 821883989.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305558 + ... + 308778.

It is an arithmetic number, because the mean of its divisors is an integer number (42119595).

Almost surely, 2^989388128 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 989388128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010870280).

989388128 is an abundant number, since it is smaller than the sum of its proper divisors (1032352432).

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

989388128 is a wasteful number, since it uses less digits than its factorization.

989388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591 (or 3583 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 56.

The square root of 989388128 is about 31454.5406579082. The cubic root of 989388128 is about 996.4501226153.

The spelling of 989388128 in words is "nine hundred eighty-nine million, three hundred eighty-eight thousand, one hundred twenty-eight".