168642928 has 20 divisors (see below), whose sum is σ = 328179640. Its totient is φ = 83951424.

The previous prime is 168642911. The next prime is 168642931. The reversal of 168642928 is 829246861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19350 + ... + 26677.

It is an arithmetic number, because the mean of its divisors is an integer number (16408982).

Almost surely, 2^168642928 is an apocalyptic number.

It is an amenable number.

168642928 is a deficient number, since it is larger than the sum of its proper divisors (159536712).

168642928 is a wasteful number, since it uses less digits than its factorization.

168642928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46264 (or 46258 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 168642928 is about 12986.2591996310. The cubic root of 168642928 is about 552.4878240323.

The spelling of 168642928 in words is "one hundred sixty-eight million, six hundred forty-two thousand, nine hundred twenty-eight".