28065233 has 4 divisors (see below), whose sum is σ = 32074560. Its totient is φ = 24055908.

The previous prime is 28065229. The next prime is 28065259. The reversal of 28065233 is 33256082.

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 28065233 - 2² = 28065229 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28065196 and 28065205.

It is not an unprimeable number, because it can be changed into a prime (28065293) 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, 2004653 + ... + 2004666.

It is an arithmetic number, because the mean of its divisors is an integer number (8018640).

Almost surely, 2^28065233 is an apocalyptic number.

It is an amenable number.

28065233 is a deficient number, since it is larger than the sum of its proper divisors (4009327).

28065233 is an equidigital number, since it uses as much as digits as its factorization.

28065233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009326.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 28065233 is about 5297.6629753128. The cubic root of 28065233 is about 303.8945307317.

The spelling of 28065233 in words is "twenty-eight million, sixty-five thousand, two hundred thirty-three".