11040640 has 64 divisors (see below), whose sum is σ = 28445760. Its totient is φ = 4073472.

The previous prime is 11040587. The next prime is 11040647. The reversal of 11040640 is 4604011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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 (11040647) 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, 7657 + ... + 8983.

It is an arithmetic number, because the mean of its divisors is an integer number (444465).

Almost surely, 2^11040640 is an apocalyptic number.

11040640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11040640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14222880).

11040640 is an abundant number, since it is smaller than the sum of its proper divisors (17405120).

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

11040640 is a wasteful number, since it uses less digits than its factorization.

11040640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1347 counting only the distinct ones).

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

The square root of 11040640 is about 3322.7458524540. The cubic root of 11040640 is about 222.6715589700.

Adding to 11040640 its reverse (4604011), we get a palindrome (15644651).

The spelling of 11040640 in words is "eleven million, forty thousand, six hundred forty".