168691028 has 48 divisors (see below), whose sum is σ = 337901760. Its totient is φ = 72979200.

The previous prime is 168691027. The next prime is 168691043. The reversal of 168691028 is 820196861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168691027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92243 + ... + 94053.

It is an arithmetic number, because the mean of its divisors is an integer number (7039620).

Almost surely, 2^168691028 is an apocalyptic number.

It is an amenable number.

168691028 is an abundant number, since it is smaller than the sum of its proper divisors (169210732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168691028 is a wasteful number, since it uses less digits than its factorization.

168691028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 168691028 is about 12988.1110250875. Note that the first 3 decimals coincide. The cubic root of 168691028 is about 552.5403455315.

It can be divided in two parts, 168 and 691028, that added together give a palindrome (691196).

The spelling of 168691028 in words is "one hundred sixty-eight million, six hundred ninety-one thousand, twenty-eight".