28266494879 has 4 divisors (see below), whose sum is σ = 32304565584. Its totient is φ = 24228424176.

The previous prime is 28266494873. The next prime is 28266494887. The reversal of 28266494879 is 97849466282.

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 28266494879 - 2³² = 23971527583 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 (28266494873) 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, 2019035342 + ... + 2019035355.

It is an arithmetic number, because the mean of its divisors is an integer number (8076141396).

Almost surely, 2^28266494879 is an apocalyptic number.

28266494879 is a deficient number, since it is larger than the sum of its proper divisors (4038070705).

28266494879 is an equidigital number, since it uses as much as digits as its factorization.

28266494879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038070704.

The product of its digits is 83607552, while the sum is 65.

The spelling of 28266494879 in words is "twenty-eight billion, two hundred sixty-six million, four hundred ninety-four thousand, eight hundred seventy-nine".