138634492 has 6 divisors (see below), whose sum is σ = 242610368. Its totient is φ = 69317244.

The previous prime is 138634487. The next prime is 138634553. The reversal of 138634492 is 294436831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17329308 + ... + 17329315.

Almost surely, 2^138634492 is an apocalyptic number.

It is an amenable number.

138634492 is a deficient number, since it is larger than the sum of its proper divisors (103975876).

138634492 is a wasteful number, since it uses less digits than its factorization.

138634492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34658627 (or 34658625 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 138634492 is about 11774.3149269926. The cubic root of 138634492 is about 517.5557029665. Note that the first 3 decimals are identical.

The spelling of 138634492 in words is "one hundred thirty-eight million, six hundred thirty-four thousand, four hundred ninety-two".