28317319 has 4 divisors (see below), whose sum is σ = 28344096. Its totient is φ = 28290544.

The previous prime is 28317299. The next prime is 28317337. The reversal of 28317319 is 91371382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28317319 - 2⁵ = 28317287 is a prime.

It is a super-2 number, since 2×28317319² = 1603741110695522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11734 + ... + 13939.

It is an arithmetic number, because the mean of its divisors is an integer number (7086024).

Almost surely, 2^28317319 is an apocalyptic number.

28317319 is a deficient number, since it is larger than the sum of its proper divisors (26777).

28317319 is a wasteful number, since it uses less digits than its factorization.

28317319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26776.

The product of its digits is 9072, while the sum is 34.

The square root of 28317319 is about 5321.4019769230. The cubic root of 28317319 is about 304.8016949764.

The spelling of 28317319 in words is "twenty-eight million, three hundred seventeen thousand, three hundred nineteen".