989640008 has 16 divisors (see below), whose sum is σ = 2120657280. Its totient is φ = 424131408.

The previous prime is 989639983. The next prime is 989640011. The reversal of 989640008 is 800046989.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 8836016 + ... + 8836127.

It is an arithmetic number, because the mean of its divisors is an integer number (132541080).

Almost surely, 2^989640008 is an apocalyptic number.

It is an amenable number.

989640008 is an abundant number, since it is smaller than the sum of its proper divisors (1131017272).

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

989640008 is a wasteful number, since it uses less digits than its factorization.

989640008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17672156 (or 17672152 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 989640008 is about 31458.5442765555. The cubic root of 989640008 is about 996.5346747252.

The spelling of 989640008 in words is "nine hundred eighty-nine million, six hundred forty thousand, eight".