168823428 has 12 divisors (see below), whose sum is σ = 393921360. Its totient is φ = 56274472.

The previous prime is 168823409. The next prime is 168823429. The reversal of 168823428 is 824328861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 168823428.

It is not an unprimeable number, because it can be changed into a prime (168823429) 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 in 3 ways as a sum of consecutive naturals, for example, 7034298 + ... + 7034321.

It is an arithmetic number, because the mean of its divisors is an integer number (32826780).

Almost surely, 2^168823428 is an apocalyptic number.

It is an amenable number.

168823428 is an abundant number, since it is smaller than the sum of its proper divisors (225097932).

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

168823428 is a wasteful number, since it uses less digits than its factorization.

168823428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068626 (or 14068624 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 168823428 is about 12993.2069944260. The cubic root of 168823428 is about 552.6848646001.

The spelling of 168823428 in words is "one hundred sixty-eight million, eight hundred twenty-three thousand, four hundred twenty-eight".