28687163 has 2 divisors, whose sum is σ = 28687164. Its totient is φ = 28687162.

The previous prime is 28687133. The next prime is 28687199. The reversal of 28687163 is 36178682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28687163 - 2⁸ = 28686907 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28687163.

It is not a weakly prime, because it can be changed into another prime (28687123) 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, 14343581 + 14343582.

It is an arithmetic number, because the mean of its divisors is an integer number (14343582).

Almost surely, 2^28687163 is an apocalyptic number.

28687163 is a deficient number, since it is larger than the sum of its proper divisors (1).

28687163 is an equidigital number, since it uses as much as digits as its factorization.

28687163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 28687163 is about 5356.0398616889. The cubic root of 28687163 is about 306.1229339308.

The spelling of 28687163 in words is "twenty-eight million, six hundred eighty-seven thousand, one hundred sixty-three".