28056444785 has 16 divisors (see below), whose sum is σ = 35847360000. Its totient is φ = 21006825216.

The previous prime is 28056444781. The next prime is 28056444827. The reversal of 28056444785 is 58744465082.

It is a cyclic number.

It is not a de Polignac number, because 28056444785 - 2² = 28056444781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28056444781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 906785 + ... + 937214.

It is an arithmetic number, because the mean of its divisors is an integer number (2240460000).

Almost surely, 2^28056444785 is an apocalyptic number.

It is an amenable number.

28056444785 is a deficient number, since it is larger than the sum of its proper divisors (7790915215).

28056444785 is a wasteful number, since it uses less digits than its factorization.

28056444785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844200.

The product of its (nonzero) digits is 8601600, while the sum is 53.

The spelling of 28056444785 in words is "twenty-eight billion, fifty-six million, four hundred forty-four thousand, seven hundred eighty-five".