8809081840 has 80 divisors (see below), whose sum is σ = 22115772000. Its totient is φ = 3243856896.

The previous prime is 8809081819. The next prime is 8809081843. The reversal of 8809081840 is 481809088.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8809081843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382986 + ... + 405334.

It is an arithmetic number, because the mean of its divisors is an integer number (276447150).

Almost surely, 2^8809081840 is an apocalyptic number.

8809081840 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 8809081840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11057886000).

8809081840 is an abundant number, since it is smaller than the sum of its proper divisors (13306690160).

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

8809081840 is a wasteful number, since it uses less digits than its factorization.

8809081840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22754 (or 22748 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 8809081840 is about 93856.7090835812. The cubic root of 8809081840 is about 2065.2702142162.

The spelling of 8809081840 in words is "eight billion, eight hundred nine million, eighty-one thousand, eight hundred forty".