138228068 has 48 divisors (see below), whose sum is σ = 277651584. Its totient is φ = 59600640.

The previous prime is 138228067. The next prime is 138228089. The reversal of 138228068 is 860822831.

It is not an unprimeable number, because it can be changed into a prime (138228061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138146 + ... + 139142.

It is an arithmetic number, because the mean of its divisors is an integer number (5784408).

Almost surely, 2^138228068 is an apocalyptic number.

It is an amenable number.

138228068 is an abundant number, since it is smaller than the sum of its proper divisors (139423516).

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

138228068 is a wasteful number, since it uses less digits than its factorization.

138228068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 138228068 is about 11757.0433358051. The cubic root of 138228068 is about 517.0494486086.

The spelling of 138228068 in words is "one hundred thirty-eight million, two hundred twenty-eight thousand, sixty-eight".