168686872 has 16 divisors (see below), whose sum is σ = 326491200. Its totient is φ = 81622560.

The previous prime is 168686821. The next prime is 168686873. The reversal of 168686872 is 278686861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168686873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339847 + ... + 340342.

It is an arithmetic number, because the mean of its divisors is an integer number (20405700).

Almost surely, 2^168686872 is an apocalyptic number.

It is an amenable number.

168686872 is a deficient number, since it is larger than the sum of its proper divisors (157804328).

168686872 is a wasteful number, since it uses less digits than its factorization.

168686872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680226 (or 680222 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 168686872 is about 12987.9510316293. The cubic root of 168686872 is about 552.5358078933.

The spelling of 168686872 in words is "one hundred sixty-eight million, six hundred eighty-six thousand, eight hundred seventy-two".