1440143344 has 40 divisors (see below), whose sum is σ = 2928553632. Its totient is φ = 684752640.

The previous prime is 1440143311. The next prime is 1440143407. The reversal of 1440143344 is 4433410441.

It is a happy number.

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, 52354 + ... + 74974.

Almost surely, 2^1440143344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440143344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464276816).

1440143344 is an abundant number, since it is smaller than the sum of its proper divisors (1488410288).

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

1440143344 is a wasteful number, since it uses less digits than its factorization.

1440143344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22825 (or 22819 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 1440143344 is about 37949.2205980571. The cubic root of 1440143344 is about 1129.2807033775.

Adding to 1440143344 its reverse (4433410441), we get a palindrome (5873553785).

The spelling of 1440143344 in words is "one billion, four hundred forty million, one hundred forty-three thousand, three hundred forty-four".