28208866 has 8 divisors (see below), whose sum is σ = 48358080. Its totient is φ = 12089508.

The previous prime is 28208857. The next prime is 28208867. The reversal of 28208866 is 66880282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28208867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007446 + ... + 1007473.

It is an arithmetic number, because the mean of its divisors is an integer number (6044760).

Almost surely, 2^28208866 is an apocalyptic number.

28208866 is a deficient number, since it is larger than the sum of its proper divisors (20149214).

28208866 is a wasteful number, since it uses less digits than its factorization.

28208866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014928.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 28208866 is about 5311.2019355321. The cubic root of 28208866 is about 304.4120753508.

The spelling of 28208866 in words is "twenty-eight million, two hundred eight thousand, eight hundred sixty-six".