138672318 has 8 divisors (see below), whose sum is σ = 277344648. Its totient is φ = 46224104.

The previous prime is 138672283. The next prime is 138672319. The reversal of 138672318 is 813276831.

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

138672318 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138672319) 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, 11556021 + ... + 11556032.

It is an arithmetic number, because the mean of its divisors is an integer number (34668081).

Almost surely, 2^138672318 is an apocalyptic number.

138672318 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.

138672318 is a wasteful number, since it uses less digits than its factorization.

138672318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23112058.

The product of its digits is 48384, while the sum is 39.

The square root of 138672318 is about 11775.9211104694. The cubic root of 138672318 is about 517.6027698532.

The spelling of 138672318 in words is "one hundred thirty-eight million, six hundred seventy-two thousand, three hundred eighteen".