168428 has 24 divisors (see below), whose sum is σ = 329280. Its totient is φ = 74880.

The previous prime is 168409. The next prime is 168433. The reversal of 168428 is 824861.

168428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×168428³ = 14333892057416256, which contains 333 as substring.

It is a Smith number, since the sum of its digits (29) 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 168428.

It is an unprimeable number.

168428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (13720).

2¹⁶⁸⁴²⁸ is an apocalyptic number.

It is an amenable number.

168428 is a deficient number, since it is larger than the sum of its proper divisors (160852).

168428 is a wasteful number, since it uses less digits than its factorization.

168428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 135 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 168428 is about 410.3998050682. The cubic root of 168428 is about 55.2253017104.

The spelling of 168428 in words is "one hundred sixty-eight thousand, four hundred twenty-eight".