8115138828 has 36 divisors (see below), whose sum is σ = 20538267568. Its totient is φ = 2701749600.

The previous prime is 8115138827. The next prime is 8115138847. The reversal of 8115138828 is 8288315118.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8115138821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107323 + ... + 166578.

Almost surely, 2^8115138828 is an apocalyptic number.

It is an amenable number.

8115138828 is an abundant number, since it is smaller than the sum of its proper divisors (12423128740).

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

8115138828 is a wasteful number, since it uses less digits than its factorization.

8115138828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274734 (or 274729 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The square root of 8115138828 is about 90084.0653389932. The cubic root of 8115138828 is about 2009.5492358164.

The spelling of 8115138828 in words is "eight billion, one hundred fifteen million, one hundred thirty-eight thousand, eight hundred twenty-eight".