12591288 has 112 divisors (see below), whose sum is σ = 37774080. Its totient is φ = 3919104.

The previous prime is 12591287. The next prime is 12591317. The reversal of 12591288 is 88219521.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 99081 + ... + 99207.

Almost surely, 2^12591288 is an apocalyptic number.

12591288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12591288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18887040).

12591288 is an abundant number, since it is smaller than the sum of its proper divisors (25182792).

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

12591288 is a wasteful number, since it uses less digits than its factorization.

12591288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 149 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12591288 is about 3548.4204936845. The cubic root of 12591288 is about 232.6430337359.

The spelling of 12591288 in words is "twelve million, five hundred ninety-one thousand, two hundred eighty-eight".