28133617 has 8 divisors (see below), whose sum is σ = 28540512. Its totient is φ = 27729600.

The previous prime is 28133603. The next prime is 28133621. The reversal of 28133617 is 71633182.

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

It is a cyclic number.

It is not a de Polignac number, because 28133617 - 2¹¹ = 28131569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28133687) 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, 25242 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (3567564).

Almost surely, 2^28133617 is an apocalyptic number.

It is an amenable number.

28133617 is a deficient number, since it is larger than the sum of its proper divisors (406895).

28133617 is a wasteful number, since it uses less digits than its factorization.

28133617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its digits is 6048, while the sum is 31.

The square root of 28133617 is about 5304.1132152321. The cubic root of 28133617 is about 304.1411545834.

Adding to 28133617 its reverse (71633182), we get a palindrome (99766799).

The spelling of 28133617 in words is "twenty-eight million, one hundred thirty-three thousand, six hundred seventeen".