168319988 has 12 divisors (see below), whose sum is σ = 297313632. Its totient is φ = 83373240.

The previous prime is 168319967. The next prime is 168320011. The reversal of 168319988 is 889913861.

It is a congruent number.

It is an unprimeable number.

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, 196208 + ... + 197063.

It is an arithmetic number, because the mean of its divisors is an integer number (24776136).

Almost surely, 2^168319988 is an apocalyptic number.

It is an amenable number.

168319988 is a deficient number, since it is larger than the sum of its proper divisors (128993644).

168319988 is a wasteful number, since it uses less digits than its factorization.

168319988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393382 (or 393380 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 168319988 is about 12973.8193297117. The cubic root of 168319988 is about 552.1349395304.

The spelling of 168319988 in words is "one hundred sixty-eight million, three hundred nineteen thousand, nine hundred eighty-eight".