11691144 has 48 divisors (see below), whose sum is σ = 32123520. Its totient is φ = 3840480.

The previous prime is 11691143. The next prime is 11691157. The reversal of 11691144 is 44119611.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11691143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3969 + ... + 6255.

It is an arithmetic number, because the mean of its divisors is an integer number (669240).

Almost surely, 2^11691144 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 11691144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16061760).

11691144 is an abundant number, since it is smaller than the sum of its proper divisors (20432376).

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

11691144 is a wasteful number, since it uses less digits than its factorization.

11691144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370 (or 2363 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 11691144 is about 3419.2314926018. The cubic root of 11691144 is about 226.9615750003.

The spelling of 11691144 in words is "eleven million, six hundred ninety-one thousand, one hundred forty-four".