168331938 has 16 divisors (see below), whose sum is σ = 336833856. Its totient is φ = 56082320.

The previous prime is 168331903. The next prime is 168331951. The reversal of 168331938 is 839133861.

It is a self number, because there is not a number n which added to its sum of digits gives 168331938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8395 + ... + 20177.

It is an arithmetic number, because the mean of its divisors is an integer number (21052116).

Almost surely, 2^168331938 is an apocalyptic number.

168331938 is an abundant number, since it is smaller than the sum of its proper divisors (168501918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168331938 is a wasteful number, since it uses less digits than its factorization.

168331938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14169.

The product of its digits is 93312, while the sum is 42.

The square root of 168331938 is about 12974.2798644087. The cubic root of 168331938 is about 552.1480056284.

The spelling of 168331938 in words is "one hundred sixty-eight million, three hundred thirty-one thousand, nine hundred thirty-eight".