12133428 has 24 divisors (see below), whose sum is σ = 28459200. Its totient is φ = 4023360.

The previous prime is 12133421. The next prime is 12133463. The reversal of 12133428 is 82433121.

It is a junction number, because it is equal to n+sod(n) for n = 12133398 and 12133407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (1185800).

Almost surely, 2^12133428 is an apocalyptic number.

It is an amenable number.

12133428 is an abundant number, since it is smaller than the sum of its proper divisors (16325772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12133428 is a wasteful number, since it uses less digits than its factorization.

12133428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 5285 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 12133428 is about 3483.3070493426. The cubic root of 12133428 is about 229.7882613393.

Adding to 12133428 its reverse (82433121), we get a palindrome (94566549).

It can be divided in two parts, 12133 and 428, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 12133428 in words is "twelve million, one hundred thirty-three thousand, four hundred twenty-eight".