28347307 has 2 divisors, whose sum is σ = 28347308. Its totient is φ = 28347306.

The previous prime is 28347283. The next prime is 28347311. The reversal of 28347307 is 70374382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28347307 is a prime.

It is not a weakly prime, because it can be changed into another prime (28347337) 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, 14173653 + 14173654.

It is an arithmetic number, because the mean of its divisors is an integer number (14173654).

Almost surely, 2^28347307 is an apocalyptic number.

28347307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347307 is an equidigital number, since it uses as much as digits as its factorization.

28347307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 28347307 is about 5324.2189098496. The cubic root of 28347307 is about 304.9092518696.

The spelling of 28347307 in words is "twenty-eight million, three hundred forty-seven thousand, three hundred seven".