168169928 has 32 divisors (see below), whose sum is σ = 329736960. Its totient is φ = 80256000.

The previous prime is 168169909. The next prime is 168169973. The reversal of 168169928 is 829961861.

It is a happy number.

It is a super-2 number, since 2×168169928² = 56562249367050368, which contains 22 as substring.

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, 137576 + ... + 138792.

It is an arithmetic number, because the mean of its divisors is an integer number (10304280).

Almost surely, 2^168169928 is an apocalyptic number.

It is an amenable number.

168169928 is a deficient number, since it is larger than the sum of its proper divisors (161567032).

168169928 is a wasteful number, since it uses less digits than its factorization.

168169928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1993 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 168169928 is about 12968.0348549809. The cubic root of 168169928 is about 551.9708116611.

The spelling of 168169928 in words is "one hundred sixty-eight million, one hundred sixty-nine thousand, nine hundred twenty-eight".