138867394 has 8 divisors (see below), whose sum is σ = 209800080. Its totient is φ = 68934036.

The previous prime is 138867343. The next prime is 138867433. The reversal of 138867394 is 493768831.

It is a happy number.

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, 249484 + ... + 250039.

It is an arithmetic number, because the mean of its divisors is an integer number (26225010).

Almost surely, 2^138867394 is an apocalyptic number.

138867394 is a deficient number, since it is larger than the sum of its proper divisors (70932686).

138867394 is a wasteful number, since it uses less digits than its factorization.

138867394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499664.

The product of its digits is 870912, while the sum is 49.

The square root of 138867394 is about 11784.2010335873. The cubic root of 138867394 is about 517.8453671003.

The spelling of 138867394 in words is "one hundred thirty-eight million, eight hundred sixty-seven thousand, three hundred ninety-four".