28368563 has 4 divisors (see below), whose sum is σ = 30037320. Its totient is φ = 26699808.

The previous prime is 28368559. The next prime is 28368601. The reversal of 28368563 is 36586382.

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 28368563 - 2² = 28368559 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 28368563.

It is not an unprimeable number, because it can be changed into a prime (28368533) 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, 834353 + ... + 834386.

It is an arithmetic number, because the mean of its divisors is an integer number (7509330).

Almost surely, 2^28368563 is an apocalyptic number.

28368563 is a deficient number, since it is larger than the sum of its proper divisors (1668757).

28368563 is a wasteful number, since it uses less digits than its factorization.

28368563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668756.

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

The square root of 28368563 is about 5326.2146971372. The cubic root of 28368563 is about 304.9854440782.

The spelling of 28368563 in words is "twenty-eight million, three hundred sixty-eight thousand, five hundred sixty-three".