28587565 has 8 divisors (see below), whose sum is σ = 34886880. Its totient is φ = 22482192.

The previous prime is 28587563. The next prime is 28587577. The reversal of 28587565 is 56578582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28587565 - 2¹ = 28587563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28587563) 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 7 ways as a sum of consecutive naturals, for example, 48159 + ... + 48748.

It is an arithmetic number, because the mean of its divisors is an integer number (4360860).

Almost surely, 2^28587565 is an apocalyptic number.

It is an amenable number.

28587565 is a deficient number, since it is larger than the sum of its proper divisors (6299315).

28587565 is an equidigital number, since it uses as much as digits as its factorization.

28587565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96971.

The product of its digits is 672000, while the sum is 46.

The square root of 28587565 is about 5346.7340498663. The cubic root of 28587565 is about 305.7682504900.

The spelling of 28587565 in words is "twenty-eight million, five hundred eighty-seven thousand, five hundred sixty-five".