28807168 has 52 divisors (see below), whose sum is σ = 62153308. Its totient is φ = 13271040.

The previous prime is 28807151. The next prime is 28807183. The reversal of 28807168 is 86170882.

It can be written as a sum of positive squares in 2 ways, for example, as 7573504 + 21233664 = 2752^2 + 4608^2 .

It is a tau number, because it is divible by the number of its divisors (52).

It is a self number, because there is not a number n which added to its sum of digits gives 28807168.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52978 + ... + 53518.

Almost surely, 2^28807168 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 28807168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31076654).

28807168 is an abundant number, since it is smaller than the sum of its proper divisors (33346140).

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

28807168 is an equidigital number, since it uses as much as digits as its factorization.

28807168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 28807168 is about 5367.2309434195. The cubic root of 28807168 is about 306.5492009684.

The spelling of 28807168 in words is "twenty-eight million, eight hundred seven thousand, one hundred sixty-eight".