28713685 has 32 divisors (see below), whose sum is σ = 46271232. Its totient is φ = 16519680.

The previous prime is 28713677. The next prime is 28713689. The reversal of 28713685 is 58631782.

It is not a de Polignac number, because 28713685 - 2³ = 28713677 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28713689) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2137 + ... + 7873.

It is an arithmetic number, because the mean of its divisors is an integer number (1445976).

Almost surely, 2^28713685 is an apocalyptic number.

It is an amenable number.

28713685 is a deficient number, since it is larger than the sum of its proper divisors (17557547).

28713685 is a wasteful number, since it uses less digits than its factorization.

28713685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773.

The product of its digits is 80640, while the sum is 40.

The square root of 28713685 is about 5358.5151861313. The cubic root of 28713685 is about 306.2172443101.

It can be divided in two parts, 2871 and 3685, that added together give a palindrome (6556).

The spelling of 28713685 in words is "twenty-eight million, seven hundred thirteen thousand, six hundred eighty-five".