1244440431440 has 40 divisors (see below), whose sum is σ = 3063519536040. Its totient is φ = 468495220736.

The previous prime is 1244440431397. The next prime is 1244440431499. The reversal of 1244440431440 is 441340444421.

It can be written as a sum of positive squares in 4 ways, for example, as 530117960464 + 714322470976 = 728092^2 + 845176^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1244440431440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457513505 + ... + 457516224.

It is an arithmetic number, because the mean of its divisors is an integer number (76587988401).

Almost surely, 2^{1244440431440} is an apocalyptic number.

1244440431440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244440431440 is an abundant number, since it is smaller than the sum of its proper divisors (1819079104600).

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

1244440431440 is a wasteful number, since it uses less digits than its factorization.

1244440431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915029759 (or 915029753 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 1244440431440 its reverse (441340444421), we get a palindrome (1685780875861).

The spelling of 1244440431440 in words is "one trillion, two hundred forty-four billion, four hundred forty million, four hundred thirty-one thousand, four hundred forty".