28055864827 has 4 divisors (see below), whose sum is σ = 28058201136. Its totient is φ = 28053528520.

The previous prime is 28055864741. The next prime is 28055864861. The reversal of 28055864827 is 72846855082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28055864827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28055864887) 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, 1150048 + ... + 1174189.

It is an arithmetic number, because the mean of its divisors is an integer number (7014550284).

Almost surely, 2^28055864827 is an apocalyptic number.

28055864827 is a deficient number, since it is larger than the sum of its proper divisors (2336309).

28055864827 is a wasteful number, since it uses less digits than its factorization.

28055864827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336308.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 28055864827 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-four thousand, eight hundred twenty-seven".