28283233 has 4 divisors (see below), whose sum is σ = 30854448. Its totient is φ = 25712020.

The previous prime is 28283231. The next prime is 28283263. The reversal of 28283233 is 33238282.

It is a happy number.

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 28283233 - 2¹ = 28283231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28283195 and 28283204.

It is not an unprimeable number, because it can be changed into a prime (28283231) 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 3 ways as a sum of consecutive naturals, for example, 1285591 + ... + 1285612.

It is an arithmetic number, because the mean of its divisors is an integer number (7713612).

It is a self-describing number.

Almost surely, 2^28283233 is an apocalyptic number.

It is an amenable number.

28283233 is a deficient number, since it is larger than the sum of its proper divisors (2571215).

28283233 is a wasteful number, since it uses less digits than its factorization.

28283233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571214.

The product of its digits is 13824, while the sum is 31.

The square root of 28283233 is about 5318.1982851338. The cubic root of 28283233 is about 304.6793476828.

The spelling of 28283233 in words is "twenty-eight million, two hundred eighty-three thousand, two hundred thirty-three".