28386563 has 8 divisors (see below), whose sum is σ = 29430000. Its totient is φ = 27347488.

The previous prime is 28386559. The next prime is 28386569. The reversal of 28386563 is 36568382.

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 28386563 - 2² = 28386559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28386563.

It is not an unprimeable number, because it can be changed into a prime (28386569) 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, 18188 + ... + 19686.

It is an arithmetic number, because the mean of its divisors is an integer number (3678750).

Almost surely, 2^28386563 is an apocalyptic number.

28386563 is a deficient number, since it is larger than the sum of its proper divisors (1043437).

28386563 is a wasteful number, since it uses less digits than its factorization.

28386563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

The product of its digits is 207360, while the sum is 41.

The square root of 28386563 is about 5327.9041845739. The cubic root of 28386563 is about 305.0499353876.

The spelling of 28386563 in words is "twenty-eight million, three hundred eighty-six thousand, five hundred sixty-three".