28436233 has 4 divisors (see below), whose sum is σ = 32498560. Its totient is φ = 24373908.

The previous prime is 28436231. The next prime is 28436237. The reversal of 28436233 is 33263482.

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 28436233 - 2¹ = 28436231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28436195 and 28436204.

It is not an unprimeable number, because it can be changed into a prime (28436231) 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, 2031153 + ... + 2031166.

It is an arithmetic number, because the mean of its divisors is an integer number (8124640).

Almost surely, 2^28436233 is an apocalyptic number.

It is an amenable number.

28436233 is a deficient number, since it is larger than the sum of its proper divisors (4062327).

28436233 is an equidigital number, since it uses as much as digits as its factorization.

28436233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062326.

The product of its digits is 20736, while the sum is 31.

The square root of 28436233 is about 5332.5634548498. The cubic root of 28436233 is about 305.2277542786.

The spelling of 28436233 in words is "twenty-eight million, four hundred thirty-six thousand, two hundred thirty-three".