28318319 has 2 divisors, whose sum is σ = 28318320. Its totient is φ = 28318318.

The previous prime is 28318307. The next prime is 28318321. The reversal of 28318319 is 91381382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28318319 - 2⁸ = 28318063 is a prime.

It is a super-2 number, since 2×28318319² = 1603854381971522, which contains 22 as substring.

Together with 28318321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28318349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159159 + 14159160.

It is an arithmetic number, because the mean of its divisors is an integer number (14159160).

Almost surely, 2^28318319 is an apocalyptic number.

28318319 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318319 is an equidigital number, since it uses as much as digits as its factorization.

28318319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 28318319 is about 5321.4959362946. The cubic root of 28318319 is about 304.8052828644.

The spelling of 28318319 in words is "twenty-eight million, three hundred eighteen thousand, three hundred nineteen".