28430563 has 8 divisors (see below), whose sum is σ = 32617728. Its totient is φ = 24274824.

The previous prime is 28430561. The next prime is 28430569. The reversal of 28430563 is 36503482.

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

It is not a de Polignac number, because 28430563 - 2¹ = 28430561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28430561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (4077216).

Almost surely, 2^28430563 is an apocalyptic number.

28430563 is a deficient number, since it is larger than the sum of its proper divisors (4187165).

28430563 is a wasteful number, since it uses less digits than its factorization.

28430563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15713.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 28430563 is about 5332.0317891025. The cubic root of 28430563 is about 305.2074661201.

The spelling of 28430563 in words is "twenty-eight million, four hundred thirty thousand, five hundred sixty-three".