989120920 has 16 divisors (see below), whose sum is σ = 2225522160. Its totient is φ = 395648352.

The previous prime is 989120903. The next prime is 989120921. The reversal of 989120920 is 29021989.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 24728023 = 989120920 / (9 + 8 + 9 + 1 + 2 + 0 + 9 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989120921) 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, 12363972 + ... + 12364051.

It is an arithmetic number, because the mean of its divisors is an integer number (139095135).

Almost surely, 2^989120920 is an apocalyptic number.

It is an amenable number.

989120920 is an abundant number, since it is smaller than the sum of its proper divisors (1236401240).

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

989120920 is a wasteful number, since it uses less digits than its factorization.

989120920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24728034 (or 24728030 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 989120920 is about 31450.2928444236. The cubic root of 989120920 is about 996.3604094514.

The spelling of 989120920 in words is "nine hundred eighty-nine million, one hundred twenty thousand, nine hundred twenty".