138234904 has 16 divisors (see below), whose sum is σ = 260179920. Its totient is φ = 68853600.

The previous prime is 138234883. The next prime is 138234907. The reversal of 138234904 is 409432831.

It is a self number, because there is not a number n which added to its sum of digits gives 138234904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138234907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30747 + ... + 34954.

It is an arithmetic number, because the mean of its divisors is an integer number (16261245).

Almost surely, 2^138234904 is an apocalyptic number.

It is an amenable number.

138234904 is a deficient number, since it is larger than the sum of its proper divisors (121945016).

138234904 is a wasteful number, since it uses less digits than its factorization.

138234904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65970 (or 65966 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 138234904 is about 11757.3340515612. The cubic root of 138234904 is about 517.0579719421.

The spelling of 138234904 in words is "one hundred thirty-eight million, two hundred thirty-four thousand, nine hundred four".