28668233 has 8 divisors (see below), whose sum is σ = 31337280. Its totient is φ = 26009680.

The previous prime is 28668221. The next prime is 28668247. The reversal of 28668233 is 33286682.

It is a happy number.

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 28668233 - 2⁴ = 28668217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28668293) 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, 3788 + ... + 8466.

It is an arithmetic number, because the mean of its divisors is an integer number (3917160).

Almost surely, 2^28668233 is an apocalyptic number.

It is an amenable number.

28668233 is a deficient number, since it is larger than the sum of its proper divisors (2669047).

28668233 is a wasteful number, since it uses less digits than its factorization.

28668233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247.

The product of its digits is 82944, while the sum is 38.

The square root of 28668233 is about 5354.2724062192. The cubic root of 28668233 is about 306.0555846168.

The spelling of 28668233 in words is "twenty-eight million, six hundred sixty-eight thousand, two hundred thirty-three".