28396785 has 24 divisors (see below), whose sum is σ = 46143360. Its totient is φ = 14912128.

The previous prime is 28396777. The next prime is 28396799. The reversal of 28396785 is 58769382.

It is not a de Polignac number, because 28396785 - 2³ = 28396777 is a prime.

Its product of digits (725760) is a multiple of the sum of its prime divisors (336).

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 23 ways as a sum of consecutive naturals, for example, 118696 + ... + 118934.

It is an arithmetic number, because the mean of its divisors is an integer number (1922640).

Almost surely, 2^28396785 is an apocalyptic number.

It is an amenable number.

28396785 is a deficient number, since it is larger than the sum of its proper divisors (17746575).

28396785 is an equidigital number, since it uses as much as digits as its factorization.

28396785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 336 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 28396785 is about 5328.8633872525. The cubic root of 28396785 is about 305.0865471491.

The spelling of 28396785 in words is "twenty-eight million, three hundred ninety-six thousand, seven hundred eighty-five".