138195452 has 12 divisors (see below), whose sum is σ = 242161920. Its totient is φ = 69006336.

The previous prime is 138195451. The next prime is 138195509. The reversal of 138195452 is 254591831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138195451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19388 + ... + 25539.

It is an arithmetic number, because the mean of its divisors is an integer number (20180160).

Almost surely, 2^138195452 is an apocalyptic number.

It is an amenable number.

138195452 is a deficient number, since it is larger than the sum of its proper divisors (103966468).

138195452 is a wasteful number, since it uses less digits than its factorization.

138195452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45700 (or 45698 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 138195452 is about 11755.6561705419. The cubic root of 138195452 is about 517.0087781147.

The spelling of 138195452 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, four hundred fifty-two".