989898940 has 24 divisors (see below), whose sum is σ = 2102148720. Its totient is φ = 391509888.

The previous prime is 989898929. The next prime is 989898941. The reversal of 989898940 is 49898989.

It is a super-2 number, since 2×989898940² = 1959799822826247200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989898941) 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, 276282 + ... + 279841.

It is an arithmetic number, because the mean of its divisors is an integer number (87589530).

Almost surely, 2^989898940 is an apocalyptic number.

It is an amenable number.

989898940 is an abundant number, since it is smaller than the sum of its proper divisors (1112249780).

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

989898940 is a wasteful number, since it uses less digits than its factorization.

989898940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556221 (or 556219 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 64.

The square root of 989898940 is about 31462.6594552972. The cubic root of 989898940 is about 996.6215791259.

The spelling of 989898940 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred forty".