12228733 has 4 divisors (see below), whose sum is σ = 13340448. Its totient is φ = 11117020.

The previous prime is 12228721. The next prime is 12228739. The reversal of 12228733 is 33782221.

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 12228733 - 2⁹ = 12228221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228739) 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, 555841 + ... + 555862.

It is an arithmetic number, because the mean of its divisors is an integer number (3335112).

Almost surely, 2^12228733 is an apocalyptic number.

It is an amenable number.

12228733 is a deficient number, since it is larger than the sum of its proper divisors (1111715).

12228733 is a wasteful number, since it uses less digits than its factorization.

12228733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111714.

The product of its digits is 4032, while the sum is 28.

The square root of 12228733 is about 3496.9605373810. The cubic root of 12228733 is about 230.3883357670.

The spelling of 12228733 in words is "twelve million, two hundred twenty-eight thousand, seven hundred thirty-three".