11911040 has 64 divisors (see below), whose sum is σ = 29302560. Its totient is φ = 4626432.

The previous prime is 11911027. The next prime is 11911057. The reversal of 11911040 is 4011911.

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

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, 23429 + ... + 23931.

Almost surely, 2^11911040 is an apocalyptic number.

11911040 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 11911040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14651280).

11911040 is an abundant number, since it is smaller than the sum of its proper divisors (17391520).

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

11911040 is an equidigital number, since it uses as much as digits as its factorization.

11911040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 11911040 is about 3451.2374592311. The cubic root of 11911040 is about 228.3757014932.

Adding to 11911040 its reverse (4011911), we get a palindrome (15922951).

The spelling of 11911040 in words is "eleven million, nine hundred eleven thousand, forty".