11331440 has 40 divisors (see below), whose sum is σ = 26516160. Its totient is φ = 4503296.

The previous prime is 11331389. The next prime is 11331473. The reversal of 11331440 is 4413311.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 15401 + ... + 16119.

It is an arithmetic number, because the mean of its divisors is an integer number (662904).

Almost surely, 2^11331440 is an apocalyptic number.

11331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331440 is an abundant number, since it is smaller than the sum of its proper divisors (15184720).

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

11331440 is a wasteful number, since it uses less digits than its factorization.

11331440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 11331440 is about 3366.2204324732. The cubic root of 11331440 is about 224.6096276269.

Adding to 11331440 its reverse (4413311), we get a palindrome (15744751).

The spelling of 11331440 in words is "eleven million, three hundred thirty-one thousand, four hundred forty".