28636233 has 4 divisors (see below), whose sum is σ = 38181648. Its totient is φ = 19090820.

The previous prime is 28636213. The next prime is 28636247. The reversal of 28636233 is 33263682.

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 28636233 - 2⁶ = 28636169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28636194 and 28636203.

It is not an unprimeable number, because it can be changed into a prime (28636213) 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, 4772703 + ... + 4772708.

It is an arithmetic number, because the mean of its divisors is an integer number (9545412).

Almost surely, 2^28636233 is an apocalyptic number.

It is an amenable number.

28636233 is a deficient number, since it is larger than the sum of its proper divisors (9545415).

28636233 is an equidigital number, since it uses as much as digits as its factorization.

28636233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9545414.

The product of its digits is 31104, while the sum is 33.

The square root of 28636233 is about 5351.2833040309. The cubic root of 28636233 is about 305.9416672950.

The spelling of 28636233 in words is "twenty-eight million, six hundred thirty-six thousand, two hundred thirty-three".