989779882 has 128 divisors (see below), whose sum is σ = 2068416000. Its totient is φ = 343719936.

The previous prime is 989779867. The next prime is 989779913. The reversal of 989779882 is 288977989.

Together with 1078636118 it forms an amicable pair .

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6642744 + ... + 6642892.

It is an arithmetic number, because the mean of its divisors is an integer number (16159500).

Almost surely, 2^989779882 is an apocalyptic number.

989779882 is an abundant number, since it is smaller than the sum of its proper divisors (1078636118).

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

989779882 is a wasteful number, since it uses less digits than its factorization.

989779882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 36578304, while the sum is 67.

The square root of 989779882 is about 31460.7673460137. The cubic root of 989779882 is about 996.5816220068.

The spelling of 989779882 in words is "nine hundred eighty-nine million, seven hundred seventy-nine thousand, eight hundred eighty-two".