138474838 has 8 divisors (see below), whose sum is σ = 209769120. Its totient is φ = 68551800.

The previous prime is 138474827. The next prime is 138474859. The reversal of 138474838 is 838474831.

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, 342558 + ... + 342961.

It is an arithmetic number, because the mean of its divisors is an integer number (26221140).

Almost surely, 2^138474838 is an apocalyptic number.

138474838 is a deficient number, since it is larger than the sum of its proper divisors (71294282).

138474838 is a wasteful number, since it uses less digits than its factorization.

138474838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685622.

The product of its digits is 516096, while the sum is 46.

The square root of 138474838 is about 11767.5332164392. The cubic root of 138474838 is about 517.3569511343.

The spelling of 138474838 in words is "one hundred thirty-eight million, four hundred seventy-four thousand, eight hundred thirty-eight".