28308168 has 48 divisors (see below), whose sum is σ = 87622080. Its totient is φ = 8087904.

The previous prime is 28308151. The next prime is 28308169. The reversal of 28308168 is 86180382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28308169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27580 + ... + 28587.

It is an arithmetic number, because the mean of its divisors is an integer number (1825460).

Almost surely, 2^28308168 is an apocalyptic number.

28308168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28308168 is an abundant number, since it is smaller than the sum of its proper divisors (59313912).

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

28308168 is a wasteful number, since it uses less digits than its factorization.

28308168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56186 (or 56179 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28308168 is about 5320.5420776458. The cubic root of 28308168 is about 304.7688582894.

The spelling of 28308168 in words is "twenty-eight million, three hundred eight thousand, one hundred sixty-eight".