28280266679 has 4 divisors (see below), whose sum is σ = 32320304784. Its totient is φ = 24240228576.

The previous prime is 28280266673. The next prime is 28280266727. The reversal of 28280266679 is 97666208282.

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 28280266679 - 2²⁰ = 28279218103 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 (28280266673) 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, 2020019042 + ... + 2020019055.

It is an arithmetic number, because the mean of its divisors is an integer number (8080076196).

Almost surely, 2^28280266679 is an apocalyptic number.

28280266679 is a deficient number, since it is larger than the sum of its proper divisors (4040038105).

28280266679 is an equidigital number, since it uses as much as digits as its factorization.

28280266679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040038104.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 28280266679 in words is "twenty-eight billion, two hundred eighty million, two hundred sixty-six thousand, six hundred seventy-nine".