168969728 has 20 divisors (see below), whose sum is σ = 337610460. Its totient is φ = 84484608.

The previous prime is 168969727. The next prime is 168969737. The reversal of 168969728 is 827969861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168969727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164498 + ... + 165521.

It is an arithmetic number, because the mean of its divisors is an integer number (16880523).

Almost surely, 2^168969728 is an apocalyptic number.

It is an amenable number.

168969728 is a deficient number, since it is larger than the sum of its proper divisors (168640732).

168969728 is an frugal number, since it uses more digits than its factorization.

168969728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330037 (or 330021 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The square root of 168969728 is about 12998.8356401641. The cubic root of 168969728 is about 552.8444681400.

It can be divided in two parts, 1689 and 69728, that added together give a palindrome (71417).

The spelling of 168969728 in words is "one hundred sixty-eight million, nine hundred sixty-nine thousand, seven hundred twenty-eight".