28806785 has 8 divisors (see below), whose sum is σ = 39506496. Its totient is φ = 19753200.

The previous prime is 28806779. The next prime is 28806821. The reversal of 28806785 is 58760882.

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

It is not a de Polignac number, because 28806785 - 2¹⁰ = 28805761 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411491 + ... + 411560.

It is an arithmetic number, because the mean of its divisors is an integer number (4938312).

Almost surely, 2^28806785 is an apocalyptic number.

It is an amenable number.

28806785 is a deficient number, since it is larger than the sum of its proper divisors (10699711).

28806785 is an equidigital number, since it uses as much as digits as its factorization.

28806785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823063.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 28806785 is about 5367.1952638226. The cubic root of 28806785 is about 306.5478424076.

The spelling of 28806785 in words is "twenty-eight million, eight hundred six thousand, seven hundred eighty-five".