138087318 has 8 divisors (see below), whose sum is σ = 276174648. Its totient is φ = 46029104.

The previous prime is 138087289. The next prime is 138087329. The reversal of 138087318 is 813780831.

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

138087318 is an admirable number.

It is a Curzon 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, 11507271 + ... + 11507282.

It is an arithmetic number, because the mean of its divisors is an integer number (34521831).

Almost surely, 2^138087318 is an apocalyptic number.

138087318 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.

138087318 is a wasteful number, since it uses less digits than its factorization.

138087318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23014558.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 138087318 is about 11751.0560376504. The cubic root of 138087318 is about 516.8738947197.

The spelling of 138087318 in words is "one hundred thirty-eight million, eighty-seven thousand, three hundred eighteen".