168195924 has 72 divisors (see below), whose sum is σ = 466574472. Its totient is φ = 50768640.

The previous prime is 168195917. The next prime is 168195949. The reversal of 168195924 is 429591861.

It can be written as a sum of positive squares in 4 ways, for example, as 12744900 + 155451024 = 3570^2 + 12468^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 168195924.

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 23 ways as a sum of consecutive naturals, for example, 21414 + ... + 28194.

It is an arithmetic number, because the mean of its divisors is an integer number (6480201).

Almost surely, 2^168195924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168195924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233287236).

168195924 is an abundant number, since it is smaller than the sum of its proper divisors (298378548).

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

168195924 is a wasteful number, since it uses less digits than its factorization.

168195924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857 (or 6852 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 168195924 is about 12969.0371269420. The cubic root of 168195924 is about 551.9992517318. Note that the first 3 decimals are identical.

The spelling of 168195924 in words is "one hundred sixty-eight million, one hundred ninety-five thousand, nine hundred twenty-four".