12031328 has 12 divisors (see below), whose sum is σ = 23686740. Its totient is φ = 6015648.

The previous prime is 12031319. The next prime is 12031337. The reversal of 12031328 is 82313021.

12031328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12031319) and next prime (12031337).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187958 + ... + 188021.

It is an arithmetic number, because the mean of its divisors is an integer number (1973895).

Almost surely, 2^12031328 is an apocalyptic number.

It is an amenable number.

12031328 is a deficient number, since it is larger than the sum of its proper divisors (11655412).

12031328 is an equidigital number, since it uses as much as digits as its factorization.

12031328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375989 (or 375981 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12031328 is about 3468.6204750592. The cubic root of 12031328 is about 229.1419065407.

Adding to 12031328 its reverse (82313021), we get a palindrome (94344349).

The spelling of 12031328 in words is "twelve million, thirty-one thousand, three hundred twenty-eight".