12191088 has 80 divisors (see below), whose sum is σ = 38775296. Its totient is φ = 3214080.

The previous prime is 12191087. The next prime is 12191089. The reversal of 12191088 is 88019121.

It is an interprime number because it is at equal distance from previous prime (12191087) and next prime (12191089).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12191083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2973 + ... + 5763.

Almost surely, 2^12191088 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 12191088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19387648).

12191088 is an abundant number, since it is smaller than the sum of its proper divisors (26584208).

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

12191088 is a wasteful number, since it uses less digits than its factorization.

12191088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822 (or 2816 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 12191088 is about 3491.5738571595. The cubic root of 12191088 is about 230.1516831830.

The spelling of 12191088 in words is "twelve million, one hundred ninety-one thousand, eighty-eight".