28528565 has 32 divisors (see below), whose sum is σ = 38586240. Its totient is φ = 20111616.

The previous prime is 28528543. The next prime is 28528571. The reversal of 28528565 is 56582582.

It is not a de Polignac number, because 28528565 - 2⁶ = 28528501 is a prime.

It is a Smith number, since the sum of its digits (41) 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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164819 + ... + 164991.

It is an arithmetic number, because the mean of its divisors is an integer number (1205820).

Almost surely, 2^28528565 is an apocalyptic number.

It is an amenable number.

28528565 is a deficient number, since it is larger than the sum of its proper divisors (10057675).

28528565 is a wasteful number, since it uses less digits than its factorization.

28528565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 192000, while the sum is 41.

The square root of 28528565 is about 5341.2138133574. The cubic root of 28528565 is about 305.5577539358.

The spelling of 28528565 in words is "twenty-eight million, five hundred twenty-eight thousand, five hundred sixty-five".