28056284611 has 4 divisors (see below), whose sum is σ = 29706654312. Its totient is φ = 26405914912.

The previous prime is 28056284591. The next prime is 28056284647. The reversal of 28056284611 is 11648265082.

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 28056284611 - 2¹⁹ = 28055760323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28056284411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825184825 + ... + 825184858.

It is an arithmetic number, because the mean of its divisors is an integer number (7426663578).

Almost surely, 2^28056284611 is an apocalyptic number.

28056284611 is a deficient number, since it is larger than the sum of its proper divisors (1650369701).

28056284611 is a wasteful number, since it uses less digits than its factorization.

28056284611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650369700.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 28056284611 in words is "twenty-eight billion, fifty-six million, two hundred eighty-four thousand, six hundred eleven".