28116563 has 2 divisors, whose sum is σ = 28116564. Its totient is φ = 28116562.

The previous prime is 28116533. The next prime is 28116581. The reversal of 28116563 is 36561182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28116563 - 2⁸ = 28116307 is a prime.

It is a super-2 number, since 2×28116563² = 1581082229865938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28116533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14058281 + 14058282.

It is an arithmetic number, because the mean of its divisors is an integer number (14058282).

Almost surely, 2^28116563 is an apocalyptic number.

28116563 is a deficient number, since it is larger than the sum of its proper divisors (1).

28116563 is an equidigital number, since it uses as much as digits as its factorization.

28116563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 28116563 is about 5302.5053512467. The cubic root of 28116563 is about 304.0796875296.

The spelling of 28116563 in words is "twenty-eight million, one hundred sixteen thousand, five hundred sixty-three".