12691088 has 40 divisors (see below), whose sum is σ = 26188800. Its totient is φ = 5940864.

The previous prime is 12691087. The next prime is 12691093. The reversal of 12691088 is 88019621.

It is a super-2 number, since 2×12691088² = 322127429247488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12691087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32945 + ... + 33327.

It is an arithmetic number, because the mean of its divisors is an integer number (654720).

Almost surely, 2^12691088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12691088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13094400).

12691088 is an abundant number, since it is smaller than the sum of its proper divisors (13497712).

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

12691088 is a wasteful number, since it uses less digits than its factorization.

12691088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12691088 is about 3562.4553330533. The cubic root of 12691088 is about 233.2560687490.

The spelling of 12691088 in words is "twelve million, six hundred ninety-one thousand, eighty-eight".