989155888 has 20 divisors (see below), whose sum is σ = 2190274000. Its totient is φ = 423923904.

The previous prime is 989155877. The next prime is 989155889. The reversal of 989155888 is 888551989.

It is a happy number.

989155888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (989155889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4415763 + ... + 4415986.

It is an arithmetic number, because the mean of its divisors is an integer number (109513700).

Almost surely, 2^989155888 is an apocalyptic number.

It is an amenable number.

989155888 is an abundant number, since it is smaller than the sum of its proper divisors (1201118112).

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

989155888 is a wasteful number, since it uses less digits than its factorization.

989155888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8831764 (or 8831758 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 61.

The square root of 989155888 is about 31450.8487643815. The cubic root of 989155888 is about 996.3721506246.

The spelling of 989155888 in words is "nine hundred eighty-nine million, one hundred fifty-five thousand, eight hundred eighty-eight".