1440343423 has 4 divisors (see below), whose sum is σ = 1467519768. Its totient is φ = 1413167080.

The previous prime is 1440343403. The next prime is 1440343427. The reversal of 1440343423 is 3243430441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1440343423 - 2⁵ = 1440343391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440343391 and 1440343400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440343427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13588093 + ... + 13588198.

It is an arithmetic number, because the mean of its divisors is an integer number (366879942).

Almost surely, 2^1440343423 is an apocalyptic number.

1440343423 is a deficient number, since it is larger than the sum of its proper divisors (27176345).

1440343423 is an equidigital number, since it uses as much as digits as its factorization.

1440343423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27176344.

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 1440343423 is about 37951.8566476003. The cubic root of 1440343423 is about 1129.3329979152.

Adding to 1440343423 its reverse (3243430441), we get a palindrome (4683773864).

The spelling of 1440343423 in words is "one billion, four hundred forty million, three hundred forty-three thousand, four hundred twenty-three".