28364815 has 16 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 21319200.

The previous prime is 28364797. The next prime is 28364839. The reversal of 28364815 is 51846382.

It is a happy number.

It is not a de Polignac number, because 28364815 - 2¹¹ = 28362767 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 10890 + ... + 13240.

It is an arithmetic number, because the mean of its divisors is an integer number (2257920).

Almost surely, 2^28364815 is an apocalyptic number.

28364815 is a deficient number, since it is larger than the sum of its proper divisors (7761905).

28364815 is a wasteful number, since it uses less digits than its factorization.

28364815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502.

The product of its digits is 46080, while the sum is 37.

The square root of 28364815 is about 5325.8628408925. The cubic root of 28364815 is about 304.9720121232.

The spelling of 28364815 in words is "twenty-eight million, three hundred sixty-four thousand, eight hundred fifteen".