28324815 has 16 divisors (see below), whose sum is σ = 45385728. Its totient is φ = 15084576.

The previous prime is 28324789. The next prime is 28324847. The reversal of 28324815 is 51842382.

It is not a de Polignac number, because 28324815 - 2⁵ = 28324783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19194 + ... + 20616.

It is an arithmetic number, because the mean of its divisors is an integer number (2836608).

Almost surely, 2^28324815 is an apocalyptic number.

28324815 is a deficient number, since it is larger than the sum of its proper divisors (17060913).

28324815 is a wasteful number, since it uses less digits than its factorization.

28324815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758.

The product of its digits is 15360, while the sum is 33.

The square root of 28324815 is about 5322.1062559855. The cubic root of 28324815 is about 304.8285877286.

The spelling of 28324815 in words is "twenty-eight million, three hundred twenty-four thousand, eight hundred fifteen".