28055878271 has 4 divisors (see below), whose sum is σ = 28060570392. Its totient is φ = 28051186152.

The previous prime is 28055878259. The next prime is 28055878313. The reversal of 28055878271 is 17287855082.

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 28055878271 - 2²⁶ = 27988769407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055878231) 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, 2337080 + ... + 2349053.

It is an arithmetic number, because the mean of its divisors is an integer number (7015142598).

Almost surely, 2^28055878271 is an apocalyptic number.

28055878271 is a deficient number, since it is larger than the sum of its proper divisors (4692121).

28055878271 is an equidigital number, since it uses as much as digits as its factorization.

28055878271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692120.

The product of its (nonzero) digits is 2508800, while the sum is 53.

The spelling of 28055878271 in words is "twenty-eight billion, fifty-five million, eight hundred seventy-eight thousand, two hundred seventy-one".