11091440 has 40 divisors (see below), whose sum is σ = 27148560. Its totient is φ = 4202496.

The previous prime is 11091433. The next prime is 11091449. The reversal of 11091440 is 4419011.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11091449) 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, 2129 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (678714).

Almost surely, 2^11091440 is an apocalyptic number.

11091440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11091440 is an abundant number, since it is smaller than the sum of its proper divisors (16057120).

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

11091440 is a wasteful number, since it uses less digits than its factorization.

11091440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329 (or 7323 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11091440 is about 3330.3813595443. The cubic root of 11091440 is about 223.0125540065.

The spelling of 11091440 in words is "eleven million, ninety-one thousand, four hundred forty".