28285808 has 10 divisors (see below), whose sum is σ = 54803784. Its totient is φ = 14142896.

The previous prime is 28285801. The next prime is 28285811. The reversal of 28285808 is 80858282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883916 + ... + 883947.

Almost surely, 2^28285808 is an apocalyptic number.

It is an amenable number.

28285808 is a deficient number, since it is larger than the sum of its proper divisors (26517976).

28285808 is a wasteful number, since it uses less digits than its factorization.

28285808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767871 (or 1767865 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 41.

The square root of 28285808 is about 5318.4403728913. The cubic root of 28285808 is about 304.6885937440.

The spelling of 28285808 in words is "twenty-eight million, two hundred eighty-five thousand, eight hundred eight".