28814309791 has 2 divisors, whose sum is σ = 28814309792. Its totient is φ = 28814309790.

The previous prime is 28814309747. The next prime is 28814309801. The reversal of 28814309791 is 19790341882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28814309791 - 2²⁹ = 28277438879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28814309731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14407154895 + 14407154896.

It is an arithmetic number, because the mean of its divisors is an integer number (14407154896).

Almost surely, 2^28814309791 is an apocalyptic number.

28814309791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28814309791 is an equidigital number, since it uses as much as digits as its factorization.

28814309791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 28814309791 in words is "twenty-eight billion, eight hundred fourteen million, three hundred nine thousand, seven hundred ninety-one".