12733228 has 6 divisors (see below), whose sum is σ = 22283156. Its totient is φ = 6366612.

The previous prime is 12733223. The next prime is 12733229. The reversal of 12733228 is 82233721.

It is a junction number, because it is equal to n+sod(n) for n = 12733196 and 12733205.

It is not an unprimeable number, because it can be changed into a prime (12733223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1591650 + ... + 1591657.

Almost surely, 2^12733228 is an apocalyptic number.

It is an amenable number.

12733228 is a deficient number, since it is larger than the sum of its proper divisors (9549928).

12733228 is a wasteful number, since it uses less digits than its factorization.

12733228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183311 (or 3183309 counting only the distinct ones).

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

The square root of 12733228 is about 3568.3648916556. The cubic root of 12733228 is about 233.5139544779.

Adding to 12733228 its reverse (82233721), we get a palindrome (94966949).

The spelling of 12733228 in words is "twelve million, seven hundred thirty-three thousand, two hundred twenty-eight".