138692252 has 12 divisors (see below), whose sum is σ = 246130416. Its totient is φ = 68369280.

The previous prime is 138692237. The next prime is 138692263. The reversal of 138692252 is 252296831.

It is a congruent 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, 243893 + ... + 244460.

It is an arithmetic number, because the mean of its divisors is an integer number (20510868).

Almost surely, 2^138692252 is an apocalyptic number.

It is an amenable number.

138692252 is a deficient number, since it is larger than the sum of its proper divisors (107438164).

138692252 is a wasteful number, since it uses less digits than its factorization.

138692252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488428 (or 488426 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 138692252 is about 11776.7674681977. The cubic root of 138692252 is about 517.6275702829.

The spelling of 138692252 in words is "one hundred thirty-eight million, six hundred ninety-two thousand, two hundred fifty-two".