28566847 has 2 divisors, whose sum is σ = 28566848. Its totient is φ = 28566846.

The previous prime is 28566833. The next prime is 28566877. The reversal of 28566847 is 74866582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28566847 - 2¹¹ = 28564799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28566797 and 28566806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28566877) 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, 14283423 + 14283424.

It is an arithmetic number, because the mean of its divisors is an integer number (14283424).

Almost surely, 2^28566847 is an apocalyptic number.

28566847 is a deficient number, since it is larger than the sum of its proper divisors (1).

28566847 is an equidigital number, since it uses as much as digits as its factorization.

28566847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 28566847 is about 5344.7962543019. The cubic root of 28566847 is about 305.6943671125.

The spelling of 28566847 in words is "twenty-eight million, five hundred sixty-six thousand, eight hundred forty-seven".