28324717 has 2 divisors, whose sum is σ = 28324718. Its totient is φ = 28324716.

The previous prime is 28324711. The next prime is 28324729. The reversal of 28324717 is 71742382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19527561 + 8797156 = 4419^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 28324717 - 2⁷ = 28324589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28324711) 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, 14162358 + 14162359.

It is an arithmetic number, because the mean of its divisors is an integer number (14162359).

Almost surely, 2^28324717 is an apocalyptic number.

It is an amenable number.

28324717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28324717 is an equidigital number, since it uses as much as digits as its factorization.

28324717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 28324717 is about 5322.0970490963. The cubic root of 28324717 is about 304.8282361731.

The spelling of 28324717 in words is "twenty-eight million, three hundred twenty-four thousand, seven hundred seventeen".