28716866 has 8 divisors (see below), whose sum is σ = 45342480. Its totient is φ = 13602708.

The previous prime is 28716841. The next prime is 28716899. The reversal of 28716866 is 66861782.

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

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 3 ways as a sum of consecutive naturals, for example, 377816 + ... + 377891.

It is an arithmetic number, because the mean of its divisors is an integer number (5667810).

Almost surely, 2^28716866 is an apocalyptic number.

28716866 is a deficient number, since it is larger than the sum of its proper divisors (16625614).

28716866 is a wasteful number, since it uses less digits than its factorization.

28716866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755728.

The product of its digits is 193536, while the sum is 44.

The square root of 28716866 is about 5358.8119952094. The cubic root of 28716866 is about 306.2285518229.

The spelling of 28716866 in words is "twenty-eight million, seven hundred sixteen thousand, eight hundred sixty-six".