138838974 has 8 divisors (see below), whose sum is σ = 277677960. Its totient is φ = 46279656.

The previous prime is 138838969. The next prime is 138838981. The reversal of 138838974 is 479838831.

It is a sphenic number, since it is the product of 3 distinct primes.

138838974 is an admirable 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 in 3 ways as a sum of consecutive naturals, for example, 11569909 + ... + 11569920.

It is an arithmetic number, because the mean of its divisors is an integer number (34709745).

Almost surely, 2^138838974 is an apocalyptic number.

138838974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138838974 is a wasteful number, since it uses less digits than its factorization.

138838974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23139834.

The product of its digits is 1161216, while the sum is 51.

The square root of 138838974 is about 11782.9951200873. The cubic root of 138838974 is about 517.8100380261.

The spelling of 138838974 in words is "one hundred thirty-eight million, eight hundred thirty-eight thousand, nine hundred seventy-four".