1244441440 has 72 divisors (see below), whose sum is σ = 3231612720. Its totient is φ = 452517120.

The previous prime is 1244441413. The next prime is 1244441441. The reversal of 1244441440 is 441444421.

It is a junction number, because it is equal to n+sod(n) for n = 1244441399 and 1244441408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244441441) 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 11 ways as a sum of consecutive naturals, for example, 12780 + ... + 51499.

It is an arithmetic number, because the mean of its divisors is an integer number (44883510).

Almost surely, 2^1244441440 is an apocalyptic number.

1244441440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244441440 is an abundant number, since it is smaller than the sum of its proper divisors (1987171280).

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

1244441440 is a wasteful number, since it uses less digits than its factorization.

1244441440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64316 (or 64297 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 1244441440 is about 35276.6415635049. The cubic root of 1244441440 is about 1075.6182317317.

Adding to 1244441440 its reverse (441444421), we get a palindrome (1685885861).

The spelling of 1244441440 in words is "one billion, two hundred forty-four million, four hundred forty-one thousand, four hundred forty".