1243313444320 has 96 divisors (see below), whose sum is σ = 3112552396800. Its totient is φ = 467703668736.

The previous prime is 1243313444311. The next prime is 1243313444323. The reversal of 1243313444320 is 234443133421.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243313444323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3300186 + ... + 3657574.

It is an arithmetic number, because the mean of its divisors is an integer number (32422420800).

Almost surely, 2^{1243313444320} is an apocalyptic number.

1243313444320 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 1243313444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556276198400).

1243313444320 is an abundant number, since it is smaller than the sum of its proper divisors (1869238952480).

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

1243313444320 is a wasteful number, since it uses less digits than its factorization.

1243313444320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358700 (or 358692 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 1243313444320 its reverse (234443133421), we get a palindrome (1477756577741).

The spelling of 1243313444320 in words is "one trillion, two hundred forty-three billion, three hundred thirteen million, four hundred forty-four thousand, three hundred twenty".