11491808 has 48 divisors (see below), whose sum is σ = 24449040. Its totient is φ = 5299200.

The previous prime is 11491807. The next prime is 11491841. The reversal of 11491808 is 80819411.

It is a super-2 number, since 2×11491808² = 264123302217728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11491807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24698 + ... + 25158.

It is an arithmetic number, because the mean of its divisors is an integer number (509355).

Almost surely, 2^11491808 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 11491808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12224520).

11491808 is an abundant number, since it is smaller than the sum of its proper divisors (12957232).

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

11491808 is a wasteful number, since it uses less digits than its factorization.

11491808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 11491808 is about 3389.9569318798. The cubic root of 11491808 is about 225.6642624971.

The spelling of 11491808 in words is "eleven million, four hundred ninety-one thousand, eight hundred eight".