11531424 has 48 divisors (see below), whose sum is σ = 30566592. Its totient is φ = 3806208.

The previous prime is 11531419. The next prime is 11531431. The reversal of 11531424 is 42413511.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 11531424.

It is an unprimeable number.

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, 10317 + ... + 11379.

It is an arithmetic number, because the mean of its divisors is an integer number (636804).

Almost surely, 2^11531424 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 11531424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15283296).

11531424 is an abundant number, since it is smaller than the sum of its proper divisors (19035168).

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

11531424 is a wasteful number, since it uses less digits than its factorization.

11531424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1181 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 11531424 is about 3395.7950468189. The cubic root of 11531424 is about 225.9232777922.

Adding to 11531424 its reverse (42413511), we get a palindrome (53944935).

The spelling of 11531424 in words is "eleven million, five hundred thirty-one thousand, four hundred twenty-four".