8991433080 has 256 divisors, whose sum is σ = 36056448000. Its totient is φ = 1946985984.

The previous prime is 8991433063. The next prime is 8991433133. The reversal of 8991433080 is 803341998.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112342 + ... + 174938.

It is an arithmetic number, because the mean of its divisors is an integer number (140845500).

Almost surely, 2^8991433080 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 8991433080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18028224000).

8991433080 is an abundant number, since it is smaller than the sum of its proper divisors (27065014920).

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

8991433080 is a wasteful number, since it uses less digits than its factorization.

8991433080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62643 (or 62633 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 8991433080 is about 94823.1674223130. The cubic root of 8991433080 is about 2079.4236167987.

The spelling of 8991433080 in words is "eight billion, nine hundred ninety-one million, four hundred thirty-three thousand, eighty".