989940920 has 32 divisors (see below), whose sum is σ = 2287569600. Its totient is φ = 385273728.

The previous prime is 989940901. The next prime is 989940929. The reversal of 989940920 is 29049989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989940929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332960 + ... + 335919.

It is an arithmetic number, because the mean of its divisors is an integer number (71486550).

Almost surely, 2^989940920 is an apocalyptic number.

It is an amenable number.

989940920 is an abundant number, since it is smaller than the sum of its proper divisors (1297628680).

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

989940920 is a wasteful number, since it uses less digits than its factorization.

989940920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668927 (or 668923 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 989940920 is about 31463.3265882678. The cubic root of 989940920 is about 996.6356672921.

The spelling of 989940920 in words is "nine hundred eighty-nine million, nine hundred forty thousand, nine hundred twenty".