28875866 has 16 divisors (see below), whose sum is σ = 44108064. Its totient is φ = 14175504.

The previous prime is 28875857. The next prime is 28875871. The reversal of 28875866 is 66857882.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32261 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (2756754).

Almost surely, 2^28875866 is an apocalyptic number.

28875866 is a deficient number, since it is larger than the sum of its proper divisors (15232198).

28875866 is a wasteful number, since it uses less digits than its factorization.

28875866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its digits is 1290240, while the sum is 50.

The square root of 28875866 is about 5373.6268943796. The cubic root of 28875866 is about 306.7926889633.

The spelling of 28875866 in words is "twenty-eight million, eight hundred seventy-five thousand, eight hundred sixty-six".