28320599 has 2 divisors, whose sum is σ = 28320600. Its totient is φ = 28320598.

The previous prime is 28320587. The next prime is 28320637. The reversal of 28320599 is 99502382.

It is an a-pointer prime, because the next prime (28320637) can be obtained adding 28320599 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28320599 - 2⁸ = 28320343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28320499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160299 + 14160300.

It is an arithmetic number, because the mean of its divisors is an integer number (14160300).

Almost surely, 2^28320599 is an apocalyptic number.

28320599 is a deficient number, since it is larger than the sum of its proper divisors (1).

28320599 is an equidigital number, since it uses as much as digits as its factorization.

28320599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 28320599 is about 5321.7101574588. The cubic root of 28320599 is about 304.8134629332.

The spelling of 28320599 in words is "twenty-eight million, three hundred twenty thousand, five hundred ninety-nine".