28564563 has 8 divisors (see below), whose sum is σ = 38246400. Its totient is φ = 18962888.

The previous prime is 28564559. The next prime is 28564621. The reversal of 28564563 is 36546582.

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 28564563 - 2² = 28564559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28566563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19203 + ... + 20636.

It is an arithmetic number, because the mean of its divisors is an integer number (4780800).

Almost surely, 2^28564563 is an apocalyptic number.

28564563 is a deficient number, since it is larger than the sum of its proper divisors (9681837).

28564563 is a wasteful number, since it uses less digits than its factorization.

28564563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40081.

The product of its digits is 172800, while the sum is 39.

The square root of 28564563 is about 5344.5825842623. The cubic root of 28564563 is about 305.6862198530.

The spelling of 28564563 in words is "twenty-eight million, five hundred sixty-four thousand, five hundred sixty-three".