28517533 has 8 divisors (see below), whose sum is σ = 31402080. Its totient is φ = 25681680.

The previous prime is 28517519. The next prime is 28517543. The reversal of 28517533 is 33571582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28517533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28517543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10938 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (3925260).

Almost surely, 2^28517533 is an apocalyptic number.

It is an amenable number.

28517533 is a deficient number, since it is larger than the sum of its proper divisors (2884547).

28517533 is a wasteful number, since it uses less digits than its factorization.

28517533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24347.

The product of its digits is 25200, while the sum is 34.

The square root of 28517533 is about 5340.1809894422. The cubic root of 28517533 is about 305.5183624494.

The spelling of 28517533 in words is "twenty-eight million, five hundred seventeen thousand, five hundred thirty-three".