989785496 has 64 divisors (see below), whose sum is σ = 2258496000. Its totient is φ = 405724704.

The previous prime is 989785477. The next prime is 989785523. The reversal of 989785496 is 694587989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55271 + ... + 70953.

It is an arithmetic number, because the mean of its divisors is an integer number (35289000).

Almost surely, 2^989785496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989785496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129248000).

989785496 is an abundant number, since it is smaller than the sum of its proper divisors (1268710504).

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

989785496 is a wasteful number, since it uses less digits than its factorization.

989785496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15733 (or 15715 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 65.

The square root of 989785496 is about 31460.8565681229. The cubic root of 989785496 is about 996.5835061964.

The spelling of 989785496 in words is "nine hundred eighty-nine million, seven hundred eighty-five thousand, four hundred ninety-six".