28565543 has 4 divisors (see below), whose sum is σ = 28576368. Its totient is φ = 28554720.

The previous prime is 28565533. The next prime is 28565573. The reversal of 28565543 is 34556582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28565543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28565497 and 28565506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28565503) 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 3 ways as a sum of consecutive naturals, for example, 1430 + ... + 7692.

It is an arithmetic number, because the mean of its divisors is an integer number (7144092).

Almost surely, 2^28565543 is an apocalyptic number.

28565543 is a deficient number, since it is larger than the sum of its proper divisors (10825).

28565543 is an equidigital number, since it uses as much as digits as its factorization.

28565543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824.

The product of its digits is 144000, while the sum is 38.

The square root of 28565543 is about 5344.6742650979. The cubic root of 28565543 is about 305.6897156655.

The spelling of 28565543 in words is "twenty-eight million, five hundred sixty-five thousand, five hundred forty-three".