28268233 has 4 divisors (see below), whose sum is σ = 32306560. Its totient is φ = 24229908.

The previous prime is 28268231. The next prime is 28268237. The reversal of 28268233 is 33286282.

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 28268233 - 2¹ = 28268231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28268231) 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, 2019153 + ... + 2019166.

It is an arithmetic number, because the mean of its divisors is an integer number (8076640).

Almost surely, 2^28268233 is an apocalyptic number.

It is an amenable number.

28268233 is a deficient number, since it is larger than the sum of its proper divisors (4038327).

28268233 is an equidigital number, since it uses as much as digits as its factorization.

28268233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038326.

The product of its digits is 27648, while the sum is 34.

The square root of 28268233 is about 5316.7878460589. The cubic root of 28268233 is about 304.6254759727.

It can be divided in two parts, 282 and 68233, that multiplied together give a triangular number (19241706 = T₆₂₀₃).

The spelling of 28268233 in words is "twenty-eight million, two hundred sixty-eight thousand, two hundred thirty-three".