28017307 has 2 divisors, whose sum is σ = 28017308. Its totient is φ = 28017306.

The previous prime is 28017293. The next prime is 28017331. The reversal of 28017307 is 70371082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28017307 - 2⁷ = 28017179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28017007) 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, 14008653 + 14008654.

It is an arithmetic number, because the mean of its divisors is an integer number (14008654).

Almost surely, 2^28017307 is an apocalyptic number.

28017307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28017307 is an equidigital number, since it uses as much as digits as its factorization.

28017307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 28017307 is about 5293.1377272843. The cubic root of 28017307 is about 303.7214488792.

Adding to 28017307 its reverse (70371082), we get a palindrome (98388389).

The spelling of 28017307 in words is "twenty-eight million, seventeen thousand, three hundred seven".