1440320031 has 6 divisors (see below), whose sum is σ = 2080462280. Its totient is φ = 960213348.

The previous prime is 1440320017. The next prime is 1440320039. The reversal of 1440320031 is 1300230441.

It is not a de Polignac number, because 1440320031 - 2⁹ = 1440319519 is a prime.

It is a super-2 number, since 2×1440320031² = 4149043583399681922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440319986 and 1440320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440320039) 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 5 ways as a sum of consecutive naturals, for example, 80017771 + ... + 80017788.

Almost surely, 2^1440320031 is an apocalyptic number.

1440320031 is a deficient number, since it is larger than the sum of its proper divisors (640142249).

1440320031 is a wasteful number, since it uses less digits than its factorization.

1440320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160035565 (or 160035562 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1440320031 is about 37951.5484664328. The cubic root of 1440320031 is about 1129.3268842111.

Adding to 1440320031 its reverse (1300230441), we get a palindrome (2740550472).

The spelling of 1440320031 in words is "one billion, four hundred forty million, three hundred twenty thousand, thirty-one".