11321440 has 48 divisors (see below), whose sum is σ = 28809648. Its totient is φ = 4179456.

The previous prime is 11321437. The next prime is 11321441. The reversal of 11321440 is 4412311.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642 + ... + 4801.

It is an arithmetic number, because the mean of its divisors is an integer number (600201).

Almost surely, 2^11321440 is an apocalyptic number.

11321440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11321440 is an abundant number, since it is smaller than the sum of its proper divisors (17488208).

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

11321440 is a wasteful number, since it uses less digits than its factorization.

11321440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471 (or 5463 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 11321440 is about 3364.7347592344. The cubic root of 11321440 is about 224.5435354878.

Adding to 11321440 its reverse (4412311), we get a palindrome (15733751).

The spelling of 11321440 in words is "eleven million, three hundred twenty-one thousand, four hundred forty".