138684814 has 8 divisors (see below), whose sum is σ = 209013768. Its totient is φ = 69013560.

The previous prime is 138684773. The next prime is 138684823. The reversal of 138684814 is 418486831.

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

It is a congruent number.

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, 163897 + ... + 164740.

It is an arithmetic number, because the mean of its divisors is an integer number (26126721).

Almost surely, 2^138684814 is an apocalyptic number.

138684814 is a deficient number, since it is larger than the sum of its proper divisors (70328954).

138684814 is a wasteful number, since it uses less digits than its factorization.

138684814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328850.

The product of its digits is 147456, while the sum is 43.

The square root of 138684814 is about 11776.4516727238. The cubic root of 138684814 is about 517.6183167434.

The spelling of 138684814 in words is "one hundred thirty-eight million, six hundred eighty-four thousand, eight hundred fourteen".