28568233 has 4 divisors (see below), whose sum is σ = 28585728. Its totient is φ = 28550740.

The previous prime is 28568227. The next prime is 28568237. The reversal of 28568233 is 33286582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28568233 - 2⁵ = 28568201 is a prime.

It is a super-2 number, since 2×28568233² = 1632287873484578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28568192 and 28568201.

It is not an unprimeable number, because it can be changed into a prime (28568237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6013 + ... + 9658.

It is an arithmetic number, because the mean of its divisors is an integer number (7146432).

Almost surely, 2^28568233 is an apocalyptic number.

It is an amenable number.

28568233 is a deficient number, since it is larger than the sum of its proper divisors (17495).

28568233 is a wasteful number, since it uses less digits than its factorization.

28568233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17494.

The product of its digits is 69120, while the sum is 37.

The square root of 28568233 is about 5344.9259115539. The cubic root of 28568233 is about 305.6993109032.

The spelling of 28568233 in words is "twenty-eight million, five hundred sixty-eight thousand, two hundred thirty-three".