138218614 has 8 divisors (see below), whose sum is σ = 207449928. Its totient is φ = 69068640.

The previous prime is 138218579. The next prime is 138218617. The reversal of 138218614 is 416812831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138218614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138218617) by changing a digit.

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, 15892 + ... + 22999.

It is an arithmetic number, because the mean of its divisors is an integer number (25931241).

Almost surely, 2^138218614 is an apocalyptic number.

138218614 is a deficient number, since it is larger than the sum of its proper divisors (69231314).

138218614 is a wasteful number, since it uses less digits than its factorization.

138218614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40670.

The product of its digits is 9216, while the sum is 34.

The square root of 138218614 is about 11756.6412720641. The cubic root of 138218614 is about 517.0376606097.

The spelling of 138218614 in words is "one hundred thirty-eight million, two hundred eighteen thousand, six hundred fourteen".