138938 has 8 divisors (see below), whose sum is σ = 210432. Its totient is φ = 68796.

The previous prime is 138937. The next prime is 138959. The reversal of 138938 is 839831.

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

It is not an unprimeable number, because it can be changed into a prime (138937) 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, 20 + ... + 527.

It is an arithmetic number, because the mean of its divisors is an integer number (26304).

2¹³⁸⁹³⁸ is an apocalyptic number.

138938 is a deficient number, since it is larger than the sum of its proper divisors (71494).

138938 is a wasteful number, since it uses less digits than its factorization.

138938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its digits is 5184, while the sum is 32.

The square root of 138938 is about 372.7438798961. The cubic root of 138938 is about 51.7933116989.

The spelling of 138938 in words is "one hundred thirty-eight thousand, nine hundred thirty-eight".