8993816986 has 72 divisors (see below), whose sum is σ = 18003531168. Its totient is φ = 3297782400.

The previous prime is 8993816971. The next prime is 8993816987. The reversal of 8993816986 is 6896183998.

It is not an unprimeable number, because it can be changed into a prime (8993816987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 480381 + ... + 498751.

It is an arithmetic number, because the mean of its divisors is an integer number (250049044).

Almost surely, 2^8993816986 is an apocalyptic number.

8993816986 is an abundant number, since it is smaller than the sum of its proper divisors (9009714182).

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

8993816986 is a wasteful number, since it uses less digits than its factorization.

8993816986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436 (or 18408 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 67.

The square root of 8993816986 is about 94835.7368611643. The cubic root of 8993816986 is about 2079.6073736540.

The spelling of 8993816986 in words is "eight billion, nine hundred ninety-three million, eight hundred sixteen thousand, nine hundred eighty-six".