8981391800 has 24 divisors (see below), whose sum is σ = 20881736400. Its totient is φ = 3592556640.

The previous prime is 8981391799. The next prime is 8981391823. The reversal of 8981391800 is 81931898.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22453280 + ... + 22453679.

It is an arithmetic number, because the mean of its divisors is an integer number (870072350).

Almost surely, 2^8981391800 is an apocalyptic number.

It is an amenable number.

8981391800 is an abundant number, since it is smaller than the sum of its proper divisors (11900344600).

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

8981391800 is a wasteful number, since it uses less digits than its factorization.

8981391800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44906975 (or 44906966 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 8981391800 is about 94770.2052335015. The cubic root of 8981391800 is about 2078.6492555410.

The spelling of 8981391800 in words is "eight billion, nine hundred eighty-one million, three hundred ninety-one thousand, eight hundred".