28516705 has 8 divisors (see below), whose sum is σ = 39108672. Its totient is φ = 19554288.

The previous prime is 28516699. The next prime is 28516717. The reversal of 28516705 is 50761582.

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

It is a cyclic number.

It is not a de Polignac number, because 28516705 - 2¹⁵ = 28483937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407347 + ... + 407416.

It is an arithmetic number, because the mean of its divisors is an integer number (4888584).

Almost surely, 2^28516705 is an apocalyptic number.

It is an amenable number.

28516705 is a deficient number, since it is larger than the sum of its proper divisors (10591967).

28516705 is an equidigital number, since it uses as much as digits as its factorization.

28516705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814775.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 28516705 is about 5340.1034634172. The cubic root of 28516705 is about 305.5154055357.

The spelling of 28516705 in words is "twenty-eight million, five hundred sixteen thousand, seven hundred five".