28859317 has 2 divisors, whose sum is σ = 28859318. Its totient is φ = 28859316.

The previous prime is 28859287. The next prime is 28859323. The reversal of 28859317 is 71395882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14676561 + 14182756 = 3831^2 + 3766^2 .

It is a cyclic number.

It is not a de Polignac number, because 28859317 - 2¹⁹ = 28335029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28859417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14429658 + 14429659.

It is an arithmetic number, because the mean of its divisors is an integer number (14429659).

Almost surely, 2^28859317 is an apocalyptic number.

It is an amenable number.

28859317 is a deficient number, since it is larger than the sum of its proper divisors (1).

28859317 is an equidigital number, since it uses as much as digits as its factorization.

28859317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 28859317 is about 5372.0868384642. The cubic root of 28859317 is about 306.7340692791.

The spelling of 28859317 in words is "twenty-eight million, eight hundred fifty-nine thousand, three hundred seventeen".