28063866 has 16 divisors (see below), whose sum is σ = 57938688. Its totient is φ = 9052800.

The previous prime is 28063859. The next prime is 28063891. The reversal of 28063866 is 66836082.

It is a Curzon number.

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, 75255 + ... + 75626.

It is an arithmetic number, because the mean of its divisors is an integer number (3621168).

Almost surely, 2^28063866 is an apocalyptic number.

28063866 is an abundant number, since it is smaller than the sum of its proper divisors (29874822).

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

28063866 is a wasteful number, since it uses less digits than its factorization.

28063866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150917.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28063866 is about 5297.5339545868. The cubic root of 28063866 is about 303.8895966249.

It can be divided in two parts, 280 and 63866, that added together give a palindrome (64146).

The spelling of 28063866 in words is "twenty-eight million, sixty-three thousand, eight hundred sixty-six".