28320814399 has 2 divisors, whose sum is σ = 28320814400. Its totient is φ = 28320814398.

The previous prime is 28320814397. The next prime is 28320814433. The reversal of 28320814399 is 99341802382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28320814399 - 2¹ = 28320814397 is a prime.

Together with 28320814397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28320814397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160407199 + 14160407200.

It is an arithmetic number, because the mean of its divisors is an integer number (14160407200).

Almost surely, 2^28320814399 is an apocalyptic number.

28320814399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28320814399 is an equidigital number, since it uses as much as digits as its factorization.

28320814399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 28320814399 in words is "twenty-eight billion, three hundred twenty million, eight hundred fourteen thousand, three hundred ninety-nine".