28679863 has 2 divisors, whose sum is σ = 28679864. Its totient is φ = 28679862.

The previous prime is 28679857. The next prime is 28679879. The reversal of 28679863 is 36897682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28679863 - 2²¹ = 26582711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28679843) 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, 14339931 + 14339932.

It is an arithmetic number, because the mean of its divisors is an integer number (14339932).

Almost surely, 2^28679863 is an apocalyptic number.

28679863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28679863 is an equidigital number, since it uses as much as digits as its factorization.

28679863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 28679863 is about 5355.3583446862. The cubic root of 28679863 is about 306.0969654399.

The spelling of 28679863 in words is "twenty-eight million, six hundred seventy-nine thousand, eight hundred sixty-three".