28116517 has 16 divisors (see below), whose sum is σ = 33388992. Its totient is φ = 23339520.

The previous prime is 28116467. The next prime is 28116527. The reversal of 28116517 is 71561182.

It is a cyclic number.

It is not a de Polignac number, because 28116517 - 2¹¹ = 28114469 is a prime.

It is a super-2 number, since 2×28116517² = 1581077056422578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12858 + ... + 14884.

It is an arithmetic number, because the mean of its divisors is an integer number (2086812).

Almost surely, 2^28116517 is an apocalyptic number.

It is an amenable number.

28116517 is a deficient number, since it is larger than the sum of its proper divisors (5272475).

28116517 is a wasteful number, since it uses less digits than its factorization.

28116517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148.

The product of its digits is 3360, while the sum is 31.

The square root of 28116517 is about 5302.5010136727. The cubic root of 28116517 is about 304.0795217000.

Adding to 28116517 its reverse (71561182), we get a palindrome (99677699).

It can be divided in two parts, 281165 and 17, that added together give a palindrome (281182).

The spelling of 28116517 in words is "twenty-eight million, one hundred sixteen thousand, five hundred seventeen".