168971388 has 12 divisors (see below), whose sum is σ = 394266600. Its totient is φ = 56323792.

The previous prime is 168971377. The next prime is 168971393. The reversal of 168971388 is 883179861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 168971388.

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, 7040463 + ... + 7040486.

It is an arithmetic number, because the mean of its divisors is an integer number (32855550).

Almost surely, 2^168971388 is an apocalyptic number.

It is an amenable number.

168971388 is an abundant number, since it is smaller than the sum of its proper divisors (225295212).

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

168971388 is a wasteful number, since it uses less digits than its factorization.

168971388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14080956 (or 14080954 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 168971388 is about 12998.8994918801. The cubic root of 168971388 is about 552.8462785606.

The spelling of 168971388 in words is "one hundred sixty-eight million, nine hundred seventy-one thousand, three hundred eighty-eight".