28056268745 has 8 divisors (see below), whose sum is σ = 33677282184. Its totient is φ = 22438508544.

The previous prime is 28056268741. The next prime is 28056268763. The reversal of 28056268745 is 54786265082.

It can be written as a sum of positive squares in 4 ways, for example, as 3761123584 + 24295145161 = 61328^2 + 155869^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28056268745 - 2² = 28056268741 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28056268741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794294 + ... + 828863.

It is an arithmetic number, because the mean of its divisors is an integer number (4209660273).

Almost surely, 2^28056268745 is an apocalyptic number.

It is an amenable number.

28056268745 is a deficient number, since it is larger than the sum of its proper divisors (5621013439).

28056268745 is a wasteful number, since it uses less digits than its factorization.

28056268745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626619.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 28056268745 in words is "twenty-eight billion, fifty-six million, two hundred sixty-eight thousand, seven hundred forty-five".