8280394128 has 480 divisors, whose sum is σ = 27038269440. Its totient is φ = 2442908160.

The previous prime is 8280394093. The next prime is 8280394139. The reversal of 8280394128 is 8214930828.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80392125 + ... + 80392227.

It is an arithmetic number, because the mean of its divisors is an integer number (56329728).

Almost surely, 2^8280394128 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 8280394128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13519134720).

8280394128 is an abundant number, since it is smaller than the sum of its proper divisors (18757875312).

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

8280394128 is a wasteful number, since it uses less digits than its factorization.

8280394128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 8280394128 is about 90996.6709720746. The cubic root of 8280394128 is about 2023.0983827080.

The spelling of 8280394128 in words is "eight billion, two hundred eighty million, three hundred ninety-four thousand, one hundred twenty-eight".