11144420440 has 64 divisors (see below), whose sum is σ = 25973200800. Its totient is φ = 4298477568.

The previous prime is 11144420359. The next prime is 11144420447. The reversal of 11144420440 is 4402444111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11144420447) 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 15 ways as a sum of consecutive naturals, for example, 953512 + ... + 965128.

Almost surely, 2^11144420440 is an apocalyptic number.

11144420440 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 11144420440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12986600400).

11144420440 is an abundant number, since it is smaller than the sum of its proper divisors (14828780360).

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

11144420440 is a wasteful number, since it uses less digits than its factorization.

11144420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 11144420440 its reverse (4402444111), we get a palindrome (15546864551).

The spelling of 11144420440 in words is "eleven billion, one hundred forty-four million, four hundred twenty thousand, four hundred forty".