12591328 has 12 divisors (see below), whose sum is σ = 24789240. Its totient is φ = 6295648.

The previous prime is 12591323. The next prime is 12591343. The reversal of 12591328 is 82319521.

It is a self number, because there is not a number n which added to its sum of digits gives 12591328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196708 + ... + 196771.

It is an arithmetic number, because the mean of its divisors is an integer number (2065770).

Almost surely, 2^12591328 is an apocalyptic number.

It is an amenable number.

12591328 is a deficient number, since it is larger than the sum of its proper divisors (12197912).

12591328 is an equidigital number, since it uses as much as digits as its factorization.

12591328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393489 (or 393481 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 12591328 is about 3548.4261299906. The cubic root of 12591328 is about 232.6432800891.

The spelling of 12591328 in words is "twelve million, five hundred ninety-one thousand, three hundred twenty-eight".