11491884 has 72 divisors (see below), whose sum is σ = 31253040. Its totient is φ = 3549312.

The previous prime is 11491877. The next prime is 11491889. The reversal of 11491884 is 48819411.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11491889) 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 23 ways as a sum of consecutive naturals, for example, 36094 + ... + 36410.

It is an arithmetic number, because the mean of its divisors is an integer number (434070).

Almost surely, 2^11491884 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 11491884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15626520).

11491884 is an abundant number, since it is smaller than the sum of its proper divisors (19761156).

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

11491884 is a wasteful number, since it uses less digits than its factorization.

11491884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 394 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 11491884 is about 3389.9681414432. The cubic root of 11491884 is about 225.6647599659.

The spelling of 11491884 in words is "eleven million, four hundred ninety-one thousand, eight hundred eighty-four".