8138638288 has 20 divisors (see below), whose sum is σ = 17202122208. Its totient is φ = 3699380960.

The previous prime is 8138638279. The next prime is 8138638349. The reversal of 8138638288 is 8828368318.

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 3 ways as a sum of consecutive naturals, for example, 23120956 + ... + 23121307.

Almost surely, 2^8138638288 is an apocalyptic number.

8138638288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8138638288 is an abundant number, since it is smaller than the sum of its proper divisors (9063483920).

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

8138638288 is a wasteful number, since it uses less digits than its factorization.

8138638288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46242282 (or 46242276 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 55.

The square root of 8138638288 is about 90214.4017770999. The cubic root of 8138638288 is about 2011.4870877609.

The spelling of 8138638288 in words is "eight billion, one hundred thirty-eight million, six hundred thirty-eight thousand, two hundred eighty-eight".