28686583 has 2 divisors, whose sum is σ = 28686584. Its totient is φ = 28686582.

The previous prime is 28686577. The next prime is 28686587. The reversal of 28686583 is 38568682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28686583 - 2⁵ = 28686551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28686587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14343291 + 14343292.

It is an arithmetic number, because the mean of its divisors is an integer number (14343292).

Almost surely, 2^28686583 is an apocalyptic number.

28686583 is a deficient number, since it is larger than the sum of its proper divisors (1).

28686583 is an equidigital number, since it uses as much as digits as its factorization.

28686583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 46.

The square root of 28686583 is about 5355.9857169339. The cubic root of 28686583 is about 306.1208708420.

The spelling of 28686583 in words is "twenty-eight million, six hundred eighty-six thousand, five hundred eighty-three".