168394138 has 32 divisors (see below), whose sum is σ = 283564800. Its totient is φ = 74343360.

The previous prime is 168394123. The next prime is 168394151. The reversal of 168394138 is 831493861.

168394138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 168394094 and 168394103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153520 + ... + 154612.

It is an arithmetic number, because the mean of its divisors is an integer number (8861400).

Almost surely, 2^168394138 is an apocalyptic number.

168394138 is a deficient number, since it is larger than the sum of its proper divisors (115170662).

168394138 is a wasteful number, since it uses less digits than its factorization.

168394138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302.

The product of its digits is 124416, while the sum is 43.

The square root of 168394138 is about 12976.6766932062. The cubic root of 168394138 is about 552.2160049579.

The spelling of 168394138 in words is "one hundred sixty-eight million, three hundred ninety-four thousand, one hundred thirty-eight".