28517105 has 16 divisors (see below), whose sum is σ = 34867584. Its totient is φ = 22387200.

The previous prime is 28517077. The next prime is 28517161. The reversal of 28517105 is 50171582.

It is a de Polignac number, because none of the positive numbers 2^k-28517105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80609 + ... + 80961.

It is an arithmetic number, because the mean of its divisors is an integer number (2179224).

Almost surely, 2^28517105 is an apocalyptic number.

It is an amenable number.

28517105 is a deficient number, since it is larger than the sum of its proper divisors (6350479).

28517105 is a wasteful number, since it uses less digits than its factorization.

28517105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 28517105 is about 5340.1409157437. The cubic root of 28517105 is about 305.5168340035.

Adding to 28517105 its reverse (50171582), we get a palindrome (78688687).

The spelling of 28517105 in words is "twenty-eight million, five hundred seventeen thousand, one hundred five".