138385828 has 12 divisors (see below), whose sum is σ = 276771712. Its totient is φ = 59308200.

The previous prime is 138385771. The next prime is 138385843. The reversal of 138385828 is 828583831.

138385828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

138385828 is an admirable 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, 2471148 + ... + 2471203.

Almost surely, 2^138385828 is an apocalyptic number.

It is an amenable number.

138385828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138385828 is a wasteful number, since it uses less digits than its factorization.

138385828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4942362 (or 4942360 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 138385828 is about 11763.7505923919. The cubic root of 138385828 is about 517.2460770502.

The spelling of 138385828 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, eight hundred twenty-eight".