989409836 has 12 divisors (see below), whose sum is σ = 1741476912. Its totient is φ = 491845008.

The previous prime is 989409829. The next prime is 989409931. The reversal of 989409836 is 638904989.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714200 + ... + 715583.

It is an arithmetic number, because the mean of its divisors is an integer number (145123076).

Almost surely, 2^989409836 is an apocalyptic number.

It is an amenable number.

989409836 is a deficient number, since it is larger than the sum of its proper divisors (752067076).

989409836 is a wasteful number, since it uses less digits than its factorization.

989409836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429960 (or 1429958 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 989409836 is about 31454.8857254322. The cubic root of 989409836 is about 996.4574102107.

The spelling of 989409836 in words is "nine hundred eighty-nine million, four hundred nine thousand, eight hundred thirty-six".