1440242331 has 16 divisors (see below), whose sum is σ = 2123598720. Its totient is φ = 860915520.

The previous prime is 1440242327. The next prime is 1440242339. The reversal of 1440242331 is 1332420441.

It is not a de Polignac number, because 1440242331 - 2² = 1440242327 is a prime.

It is a super-2 number, since 2×1440242331² = 4148595944008627122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1440242339) 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 15 ways as a sum of consecutive naturals, for example, 296521 + ... + 301338.

It is an arithmetic number, because the mean of its divisors is an integer number (132724920).

Almost surely, 2^1440242331 is an apocalyptic number.

1440242331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1440242331 is a deficient number, since it is larger than the sum of its proper divisors (683356389).

1440242331 is a wasteful number, since it uses less digits than its factorization.

1440242331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597946.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1440242331 is about 37950.5247789803. The cubic root of 1440242331 is about 1129.3065761603.

Adding to 1440242331 its reverse (1332420441), we get a palindrome (2772662772).

The spelling of 1440242331 in words is "one billion, four hundred forty million, two hundred forty-two thousand, three hundred thirty-one".