28985863 has 2 divisors, whose sum is σ = 28985864. Its totient is φ = 28985862.

The previous prime is 28985861. The next prime is 28985903. The reversal of 28985863 is 36858982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28985863 - 2¹ = 28985861 is a prime.

Together with 28985861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28985861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492931 + 14492932.

It is an arithmetic number, because the mean of its divisors is an integer number (14492932).

Almost surely, 2^28985863 is an apocalyptic number.

28985863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28985863 is an equidigital number, since it uses as much as digits as its factorization.

28985863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The square root of 28985863 is about 5383.8520596317. The cubic root of 28985863 is about 307.1817510714.

The spelling of 28985863 in words is "twenty-eight million, nine hundred eighty-five thousand, eight hundred sixty-three".