1440331431 has 32 divisors (see below), whose sum is σ = 2443200000. Its totient is φ = 748218240.

The previous prime is 1440331379. The next prime is 1440331441. The reversal of 1440331431 is 1341330441.

It is not a de Polignac number, because 1440331431 - 2⁶ = 1440331367 is a prime.

It is a super-2 number, since 2×1440331431² = 4149109262253015522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440331441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52306 + ... + 74943.

It is an arithmetic number, because the mean of its divisors is an integer number (76350000).

Almost surely, 2^1440331431 is an apocalyptic number.

1440331431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1440331431 is a deficient number, since it is larger than the sum of its proper divisors (1002868569).

1440331431 is a wasteful number, since it uses less digits than its factorization.

1440331431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127284 (or 127270 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1440331431 is about 37951.6986576359. The cubic root of 1440331431 is about 1129.3298637092.

Adding to 1440331431 its reverse (1341330441), we get a palindrome (2781661872).

The spelling of 1440331431 in words is "one billion, four hundred forty million, three hundred thirty-one thousand, four hundred thirty-one".