8138443888 has 80 divisors (see below), whose sum is σ = 17171123200. Its totient is φ = 3722526720.

The previous prime is 8138443877. The next prime is 8138443931. The reversal of 8138443888 is 8883448318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7246495 + ... + 7247617.

It is an arithmetic number, because the mean of its divisors is an integer number (214639040).

Almost surely, 2^8138443888 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 8138443888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8585561600).

8138443888 is an abundant number, since it is smaller than the sum of its proper divisors (9032679312).

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

8138443888 is a wasteful number, since it uses less digits than its factorization.

8138443888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1944 counting only the distinct ones).

The product of its digits is 4718592, while the sum is 55.

The square root of 8138443888 is about 90213.3243373727. The cubic root of 8138443888 is about 2011.4710721332.

The spelling of 8138443888 in words is "eight billion, one hundred thirty-eight million, four hundred forty-three thousand, eight hundred eighty-eight".