28567703585 has 4 divisors (see below), whose sum is σ = 34281244308. Its totient is φ = 22854162864.

The previous prime is 28567703581. The next prime is 28567703597. The reversal of 28567703585 is 58530776582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4916954641 + 23650748944 = 70121^2 + 153788^2 .

It is a cyclic number.

It is not a de Polignac number, because 28567703585 - 2² = 28567703581 is a prime.

It is a super-2 number, since 2×28567703585² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28567703585.

It is not an unprimeable number, because it can be changed into a prime (28567703581) 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 3 ways as a sum of consecutive naturals, for example, 2856770354 + ... + 2856770363.

It is an arithmetic number, because the mean of its divisors is an integer number (8570311077).

Almost surely, 2^28567703585 is an apocalyptic number.

It is an amenable number.

28567703585 is a deficient number, since it is larger than the sum of its proper divisors (5713540723).

28567703585 is an equidigital number, since it uses as much as digits as its factorization.

28567703585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713540722.

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 28567703585 in words is "twenty-eight billion, five hundred sixty-seven million, seven hundred three thousand, five hundred eighty-five".