138819452 has 12 divisors (see below), whose sum is σ = 243065256. Its totient is φ = 69372240.

The previous prime is 138819451. The next prime is 138819493. The reversal of 138819452 is 254918831.

138819452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138819451) 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, 2 + ... + 16662.

It is an arithmetic number, because the mean of its divisors is an integer number (20255438).

Almost surely, 2^138819452 is an apocalyptic number.

It is an amenable number.

138819452 is a deficient number, since it is larger than the sum of its proper divisors (104245804).

138819452 is a wasteful number, since it uses less digits than its factorization.

138819452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18748 (or 18746 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 138819452 is about 11782.1666937792. The cubic root of 138819452 is about 517.7857673161.

The spelling of 138819452 in words is "one hundred thirty-eight million, eight hundred nineteen thousand, four hundred fifty-two".