28267879391 has 2 divisors, whose sum is σ = 28267879392. Its totient is φ = 28267879390.

The previous prime is 28267879379. The next prime is 28267879403. The reversal of 28267879391 is 19397876282.

It is a balanced prime because it is at equal distance from previous prime (28267879379) and next prime (28267879403).

It is a cyclic number.

It is not a de Polignac number, because 28267879391 - 2¹⁰ = 28267878367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28267879331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14133939695 + 14133939696.

It is an arithmetic number, because the mean of its divisors is an integer number (14133939696).

Almost surely, 2^28267879391 is an apocalyptic number.

28267879391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28267879391 is an equidigital number, since it uses as much as digits as its factorization.

28267879391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 62.

The spelling of 28267879391 in words is "twenty-eight billion, two hundred sixty-seven million, eight hundred seventy-nine thousand, three hundred ninety-one".