28263568 has 20 divisors (see below), whose sum is σ = 56528128. Its totient is φ = 13675680.

The previous prime is 28263553. The next prime is 28263577. The reversal of 28263568 is 86536282.

28263568 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28263568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27996 + ... + 28987.

Almost surely, 2^28263568 is an apocalyptic number.

It is an amenable number.

28263568 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28263568 is a wasteful number, since it uses less digits than its factorization.

28263568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57022 (or 57016 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 28263568 is about 5316.3491232236. The cubic root of 28263568 is about 304.6087179859.

The spelling of 28263568 in words is "twenty-eight million, two hundred sixty-three thousand, five hundred sixty-eight".