8138392056 has 160 divisors (see below), whose sum is σ = 24769958400. Its totient is φ = 2486998080.

The previous prime is 8138392001. The next prime is 8138392103. The reversal of 8138392056 is 6502938318.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 371011 + ... + 392333.

It is an arithmetic number, because the mean of its divisors is an integer number (154812240).

Almost surely, 2^8138392056 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 8138392056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12384979200).

8138392056 is an abundant number, since it is smaller than the sum of its proper divisors (16631566344).

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

8138392056 is a wasteful number, since it uses less digits than its factorization.

8138392056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21391 (or 21378 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 8138392056 is about 90213.0370622783. The cubic root of 8138392056 is about 2011.4668019151.

The spelling of 8138392056 in words is "eight billion, one hundred thirty-eight million, three hundred ninety-two thousand, fifty-six".