28318327391 has 2 divisors, whose sum is σ = 28318327392. Its totient is φ = 28318327390.

The previous prime is 28318327327. The next prime is 28318327397. The reversal of 28318327391 is 19372381382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28318327391 - 2⁶ = 28318327327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28318327397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159163695 + 14159163696.

It is an arithmetic number, because the mean of its divisors is an integer number (14159163696).

Almost surely, 2^28318327391 is an apocalyptic number.

28318327391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318327391 is an equidigital number, since it uses as much as digits as its factorization.

28318327391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 28318327391 in words is "twenty-eight billion, three hundred eighteen million, three hundred twenty-seven thousand, three hundred ninety-one".