12109328 has 40 divisors (see below), whose sum is σ = 29254080. Its totient is φ = 4717440.

The previous prime is 12109319. The next prime is 12109343. The reversal of 12109328 is 82390121.

It is a super-2 number, since 2×12109328² = 293271649223168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12109297 and 12109306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3683 + ... + 6146.

It is an arithmetic number, because the mean of its divisors is an integer number (731352).

Almost surely, 2^12109328 is an apocalyptic number.

It is an amenable number.

12109328 is an abundant number, since it is smaller than the sum of its proper divisors (17144752).

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

12109328 is a wasteful number, since it uses less digits than its factorization.

12109328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9855 (or 9849 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12109328 is about 3479.8459736029. The cubic root of 12109328 is about 229.6360216563.

Adding to 12109328 its reverse (82390121), we get a palindrome (94499449).

It can be divided in two parts, 121093 and 28, that added together give a palindrome (121121).

The spelling of 12109328 in words is "twelve million, one hundred nine thousand, three hundred twenty-eight".