168788728 has 8 divisors (see below), whose sum is σ = 316478880. Its totient is φ = 84394360.

The previous prime is 168788701. The next prime is 168788773. The reversal of 168788728 is 827887861.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 10549288 + ... + 10549303.

It is an arithmetic number, because the mean of its divisors is an integer number (39559860).

Almost surely, 2^168788728 is an apocalyptic number.

It is an amenable number.

168788728 is a deficient number, since it is larger than the sum of its proper divisors (147690152).

168788728 is a wasteful number, since it uses less digits than its factorization.

168788728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21098597 (or 21098593 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 55.

The square root of 168788728 is about 12991.8716126661. The cubic root of 168788728 is about 552.6469956875.

The spelling of 168788728 in words is "one hundred sixty-eight million, seven hundred eighty-eight thousand, seven hundred twenty-eight".