138231874 has 8 divisors (see below), whose sum is σ = 226197648. Its totient is φ = 62832660.

The previous prime is 138231809. The next prime is 138231901. The reversal of 138231874 is 478132831.

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

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, 3141612 + ... + 3141655.

It is an arithmetic number, because the mean of its divisors is an integer number (28274706).

Almost surely, 2^138231874 is an apocalyptic number.

138231874 is a deficient number, since it is larger than the sum of its proper divisors (87965774).

138231874 is a wasteful number, since it uses less digits than its factorization.

138231874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283280.

The product of its digits is 32256, while the sum is 37.

The square root of 138231874 is about 11757.2051951133. The cubic root of 138231874 is about 517.0541940803.

The spelling of 138231874 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, eight hundred seventy-four".