28427717 has 2 divisors, whose sum is σ = 28427718. Its totient is φ = 28427716.

The previous prime is 28427699. The next prime is 28427741. The reversal of 28427717 is 71772482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27888961 + 538756 = 5281^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 28427717 - 2¹⁸ = 28165573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28427797) 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, 14213858 + 14213859.

It is an arithmetic number, because the mean of its divisors is an integer number (14213859).

Almost surely, 2^28427717 is an apocalyptic number.

It is an amenable number.

28427717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28427717 is an equidigital number, since it uses as much as digits as its factorization.

28427717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 38.

The square root of 28427717 is about 5331.7649047947. The cubic root of 28427717 is about 305.1972816643.

The spelling of 28427717 in words is "twenty-eight million, four hundred twenty-seven thousand, seven hundred seventeen".