989709432 has 16 divisors (see below), whose sum is σ = 2474273640. Its totient is φ = 329903136.

The previous prime is 989709421. The next prime is 989709433. The reversal of 989709432 is 234907989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989709433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20618923 + ... + 20618970.

Almost surely, 2^989709432 is an apocalyptic number.

It is an amenable number.

989709432 is an abundant number, since it is smaller than the sum of its proper divisors (1484564208).

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

989709432 is a wasteful number, since it uses less digits than its factorization.

989709432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41237902 (or 41237898 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 989709432 is about 31459.6476776203. The cubic root of 989709432 is about 996.5579767357.

The spelling of 989709432 in words is "nine hundred eighty-nine million, seven hundred nine thousand, four hundred thirty-two".