1440440444 has 6 divisors (see below), whose sum is σ = 2520770784. Its totient is φ = 720220220.

The previous prime is 1440440401. The next prime is 1440440467. The reversal of 1440440444 is 4440440441.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 180055052 + ... + 180055059.

It is an arithmetic number, because the mean of its divisors is an integer number (420128464).

Almost surely, 2^1440440444 is an apocalyptic number.

It is an amenable number.

1440440444 is a deficient number, since it is larger than the sum of its proper divisors (1080330340).

1440440444 is a wasteful number, since it uses less digits than its factorization.

1440440444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360110115 (or 360110113 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

The square root of 1440440444 is about 37953.1348375862. The cubic root of 1440440444 is about 1129.3583544968.

Adding to 1440440444 its reverse (4440440441), we get a palindrome (5880880885).

The spelling of 1440440444 in words is "one billion, four hundred forty million, four hundred forty thousand, four hundred forty-four".