28544563 has 4 divisors (see below), whose sum is σ = 28561720. Its totient is φ = 28527408.

The previous prime is 28544543. The next prime is 28544599. The reversal of 28544563 is 36544582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28544563 - 2¹³ = 28536371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28544543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5778 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (7140430).

Almost surely, 2^28544563 is an apocalyptic number.

28544563 is a deficient number, since it is larger than the sum of its proper divisors (17157).

28544563 is a wasteful number, since it uses less digits than its factorization.

28544563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17156.

The product of its digits is 115200, while the sum is 37.

The square root of 28544563 is about 5342.7112031252. The cubic root of 28544563 is about 305.6148592674.

The spelling of 28544563 in words is "twenty-eight million, five hundred forty-four thousand, five hundred sixty-three".