1244440812840 has 32 divisors (see below), whose sum is σ = 3733322438880. Its totient is φ = 331850883392.

The previous prime is 1244440812809. The next prime is 1244440812847. The reversal of 1244440812840 is 482180444421.

It is a junction number, because it is equal to n+sod(n) for n = 1244440812792 and 1244440812801.

It is not an unprimeable number, because it can be changed into a prime (1244440812847) 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, 5185169934 + ... + 5185170173.

It is an arithmetic number, because the mean of its divisors is an integer number (116666326215).

Almost surely, 2^{1244440812840} is an apocalyptic number.

1244440812840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244440812840 is an abundant number, since it is smaller than the sum of its proper divisors (2488881626040).

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

1244440812840 is a wasteful number, since it uses less digits than its factorization.

1244440812840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370340121 (or 10370340117 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 42.

The spelling of 1244440812840 in words is "one trillion, two hundred forty-four billion, four hundred forty million, eight hundred twelve thousand, eight hundred forty".