28663296 has 40 divisors (see below), whose sum is σ = 76364904. Its totient is φ = 9553920.

The previous prime is 28663289. The next prime is 28663319. The reversal of 28663296 is 69236682.

It is a congruent number.

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, 7795 + ... + 10866.

Almost surely, 2^28663296 is an apocalyptic number.

It is an amenable number.

28663296 is an abundant number, since it is smaller than the sum of its proper divisors (47701608).

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

28663296 is an equidigital number, since it uses as much as digits as its factorization.

28663296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18682 (or 18666 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 28663296 is about 5353.8113526720. The cubic root of 28663296 is about 306.0380148423.

The spelling of 28663296 in words is "twenty-eight million, six hundred sixty-three thousand, two hundred ninety-six".