1440441144 has 160 divisors (see below), whose sum is σ = 4298065200. Its totient is φ = 449141760.

The previous prime is 1440441143. The next prime is 1440441157. The reversal of 1440441144 is 4411440441.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440441143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2522379 + ... + 2522949.

Almost surely, 2^1440441144 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 1440441144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149032600).

1440441144 is an abundant number, since it is smaller than the sum of its proper divisors (2857624056).

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

1440441144 is a wasteful number, since it uses less digits than its factorization.

1440441144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 1440441144 is about 37953.1440594847. The cubic root of 1440441144 is about 1129.3585374387.

Adding to 1440441144 its reverse (4411440441), we get a palindrome (5851881585).

The spelling of 1440441144 in words is "one billion, four hundred forty million, four hundred forty-one thousand, one hundred forty-four".