28320775583 has 4 divisors (see below), whose sum is σ = 28321203840. Its totient is φ = 28320347328.

The previous prime is 28320775577. The next prime is 28320775607. The reversal of 28320775583 is 38557702382.

It is a happy number.

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 28320775583 - 2⁶ = 28320775519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28320774583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91538 + ... + 254991.

It is an arithmetic number, because the mean of its divisors is an integer number (7080300960).

Almost surely, 2^28320775583 is an apocalyptic number.

28320775583 is a deficient number, since it is larger than the sum of its proper divisors (428257).

28320775583 is an equidigital number, since it uses as much as digits as its factorization.

28320775583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428256.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 28320775583 in words is "twenty-eight billion, three hundred twenty million, seven hundred seventy-five thousand, five hundred eighty-three".