28563393 has 8 divisors (see below), whose sum is σ = 38512800. Its totient is φ = 18828128.

The previous prime is 28563391. The next prime is 28563407. The reversal of 28563393 is 39336582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28563393 - 2¹ = 28563391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28563391) 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, 53223 + ... + 53756.

It is an arithmetic number, because the mean of its divisors is an integer number (4814100).

Almost surely, 2^28563393 is an apocalyptic number.

It is an amenable number.

28563393 is a deficient number, since it is larger than the sum of its proper divisors (9949407).

28563393 is a wasteful number, since it uses less digits than its factorization.

28563393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107071.

The product of its digits is 116640, while the sum is 39.

The square root of 28563393 is about 5344.4731265112. The cubic root of 28563393 is about 305.6820461762.

The spelling of 28563393 in words is "twenty-eight million, five hundred sixty-three thousand, three hundred ninety-three".