8991523040 has 96 divisors (see below), whose sum is σ = 23040902304. Its totient is φ = 3302440960.

The previous prime is 8991523039. The next prime is 8991523129. The reversal of 8991523040 is 403251998.

8991523040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71207 + ... + 151833.

It is an arithmetic number, because the mean of its divisors is an integer number (240009399).

Almost surely, 2^8991523040 is an apocalyptic number.

8991523040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8991523040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11520451152).

8991523040 is an abundant number, since it is smaller than the sum of its proper divisors (14049379264).

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

8991523040 is a wasteful number, since it uses less digits than its factorization.

8991523040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80700 (or 80692 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 8991523040 is about 94823.6417777761. The cubic root of 8991523040 is about 2079.4305517082.

The spelling of 8991523040 in words is "eight billion, nine hundred ninety-one million, five hundred twenty-three thousand, forty".