138388852 has 24 divisors (see below), whose sum is σ = 278964224. Its totient is φ = 58840992.

The previous prime is 138388829. The next prime is 138388871. The reversal of 138388852 is 258883831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15903 + ... + 23014.

Almost surely, 2^138388852 is an apocalyptic number.

It is an amenable number.

138388852 is an abundant number, since it is smaller than the sum of its proper divisors (140575372).

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

138388852 is a wasteful number, since it uses less digits than its factorization.

138388852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39055 (or 39053 counting only the distinct ones).

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

The square root of 138388852 is about 11763.8791221263. The cubic root of 138388852 is about 517.2498446343.

The spelling of 138388852 in words is "one hundred thirty-eight million, three hundred eighty-eight thousand, eight hundred fifty-two".