8380128108 has 72 divisors (see below), whose sum is σ = 22299189696. Its totient is φ = 2429002400.

The previous prime is 8380128091. The next prime is 8380128139. The reversal of 8380128108 is 8018210838.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9823 + ... + 129833.

It is an arithmetic number, because the mean of its divisors is an integer number (309710968).

Almost surely, 2^8380128108 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 8380128108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11149594848).

8380128108 is an abundant number, since it is smaller than the sum of its proper divisors (13919061588).

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

8380128108 is a wasteful number, since it uses less digits than its factorization.

8380128108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120075 (or 120050 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 8380128108 is about 91543.0396480257. The cubic root of 8380128108 is about 2031.1884543555.

The spelling of 8380128108 in words is "eight billion, three hundred eighty million, one hundred twenty-eight thousand, one hundred eight".