28717307 has 2 divisors, whose sum is σ = 28717308. Its totient is φ = 28717306.

The previous prime is 28717289. The next prime is 28717309. The reversal of 28717307 is 70371782.

28717307 is nontrivially palindromic in base 15.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28717307 - 2¹⁰ = 28716283 is a prime.

Together with 28717309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28717309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14358653 + 14358654.

It is an arithmetic number, because the mean of its divisors is an integer number (14358654).

Almost surely, 2^28717307 is an apocalyptic number.

28717307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28717307 is an equidigital number, since it uses as much as digits as its factorization.

28717307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 28717307 is about 5358.8531422311. The cubic root of 28717307 is about 306.2301193814.

The spelling of 28717307 in words is "twenty-eight million, seven hundred seventeen thousand, three hundred seven".