28056106585 has 36 divisors (see below), whose sum is σ = 37325954412. Its totient is φ = 20235406464.

The previous prime is 28056106487. The next prime is 28056106597. The reversal of 28056106585 is 58560165082.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 163098441 + 27893008144 = 12771^2 + 167012^2 .

It is not a de Polignac number, because 28056106585 - 2⁹ = 28056106073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1553427 + ... + 1571383.

It is an arithmetic number, because the mean of its divisors is an integer number (1036832067).

Almost surely, 2^28056106585 is an apocalyptic number.

It is an amenable number.

28056106585 is a deficient number, since it is larger than the sum of its proper divisors (9269847827).

28056106585 is a wasteful number, since it uses less digits than its factorization.

28056106585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18074 (or 18018 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 28056106585 in words is "twenty-eight billion, fifty-six million, one hundred six thousand, five hundred eighty-five".