28116533 has 2 divisors, whose sum is σ = 28116534. Its totient is φ = 28116532.

The previous prime is 28116527. The next prime is 28116563. The reversal of 28116533 is 33561182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28111204 + 5329 = 5302^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 28116533 - 2¹⁰ = 28115509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28116496 and 28116505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28116563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14058266 + 14058267.

It is an arithmetic number, because the mean of its divisors is an integer number (14058267).

Almost surely, 2^28116533 is an apocalyptic number.

It is an amenable number.

28116533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28116533 is an equidigital number, since it uses as much as digits as its factorization.

28116533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 28116533 is about 5302.5025223945. The cubic root of 28116533 is about 304.0795793799.

The spelling of 28116533 in words is "twenty-eight million, one hundred sixteen thousand, five hundred thirty-three".