1440144441 has 10 divisors (see below), whose sum is σ = 2151327002. Its totient is φ = 960096240.

The previous prime is 1440144413. The next prime is 1440144449. The reversal of 1440144441 is 1444410441.

It can be written as a sum of positive squares in only one way, i.e., 980942400 + 459202041 = 31320^2 + 21429^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1440144441 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1440144449) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8889700 + ... + 8889861.

Almost surely, 2^1440144441 is an apocalyptic number.

It is an amenable number.

1440144441 is a deficient number, since it is larger than the sum of its proper divisors (711182561).

1440144441 is an equidigital number, since it uses as much as digits as its factorization.

1440144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17779573 (or 17779564 counting only the distinct ones).

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

The square root of 1440144441 is about 37949.2350515791. The cubic root of 1440144441 is about 1129.2809901130.

Adding to 1440144441 its reverse (1444410441), we get a palindrome (2884554882).

The spelling of 1440144441 in words is "one billion, four hundred forty million, one hundred forty-four thousand, four hundred forty-one".