11791818 has 48 divisors (see below), whose sum is σ = 27911520. Its totient is φ = 3720816.

The previous prime is 11791817. The next prime is 11791831. The reversal of 11791818 is 81819711.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11791817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8596 + ... + 9872.

It is an arithmetic number, because the mean of its divisors is an integer number (581490).

Almost surely, 2^11791818 is an apocalyptic number.

11791818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11791818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13955760).

11791818 is an abundant number, since it is smaller than the sum of its proper divisors (16119702).

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

11791818 is a wasteful number, since it uses less digits than its factorization.

11791818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1301 counting only the distinct ones).

The product of its digits is 4032, while the sum is 36.

The square root of 11791818 is about 3433.9216648025. The cubic root of 11791818 is about 227.6111794056.

The spelling of 11791818 in words is "eleven million, seven hundred ninety-one thousand, eight hundred eighteen".