1440143444 has 24 divisors (see below), whose sum is σ = 2590193760. Its totient is φ = 700235424.

The previous prime is 1440143431. The next prime is 1440143479. The reversal of 1440143444 is 4443410441.

It is a super-2 number, since 2×1440143444² = 4148026278592362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21107 + ... + 57669.

It is an arithmetic number, because the mean of its divisors is an integer number (107924740).

Almost surely, 2^1440143444 is an apocalyptic number.

It is an amenable number.

1440143444 is a deficient number, since it is larger than the sum of its proper divisors (1150050316).

1440143444 is a wasteful number, since it uses less digits than its factorization.

1440143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36839 (or 36837 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 1440143444 is about 37949.2219156072. The cubic root of 1440143444 is about 1129.2807295156.

Adding to 1440143444 its reverse (4443410441), we get a palindrome (5883553885).

The spelling of 1440143444 in words is "one billion, four hundred forty million, one hundred forty-three thousand, four hundred forty-four".