12129328 has 10 divisors (see below), whose sum is σ = 23500604. Its totient is φ = 6064656.

The previous prime is 12129287. The next prime is 12129343. The reversal of 12129328 is 82392121.

It is a junction number, because it is equal to n+sod(n) for n = 12129296 and 12129305.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 379026 + ... + 379057.

Almost surely, 2^12129328 is an apocalyptic number.

It is an amenable number.

12129328 is a deficient number, since it is larger than the sum of its proper divisors (11371276).

12129328 is an equidigital number, since it uses as much as digits as its factorization.

12129328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758091 (or 758085 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 12129328 is about 3482.7184784303. The cubic root of 12129328 is about 229.7623758816.

The spelling of 12129328 in words is "twelve million, one hundred twenty-nine thousand, three hundred twenty-eight".