28168168 has 16 divisors (see below), whose sum is σ = 60360480. Its totient is φ = 12072048.

The previous prime is 28168163. The next prime is 28168177. The reversal of 28168168 is 86186182.

It is a self number, because there is not a number n which added to its sum of digits gives 28168168.

It is not an unprimeable number, because it can be changed into a prime (28168163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251446 + ... + 251557.

It is an arithmetic number, because the mean of its divisors is an integer number (3772530).

Almost surely, 2^28168168 is an apocalyptic number.

28168168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28168168 is an abundant number, since it is smaller than the sum of its proper divisors (32192312).

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

28168168 is a wasteful number, since it uses less digits than its factorization.

28168168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503016 (or 503012 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 28168168 is about 5307.3692164763. The cubic root of 28168168 is about 304.2656092784.

The spelling of 28168168 in words is "twenty-eight million, one hundred sixty-eight thousand, one hundred sixty-eight".