1440321423 has 4 divisors (see below), whose sum is σ = 1920428568. Its totient is φ = 960214280.

The previous prime is 1440321401. The next prime is 1440321451. The reversal of 1440321423 is 3241230441.

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 1440321423 - 2⁹ = 1440320911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440321393 and 1440321402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440321523) 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 3 ways as a sum of consecutive naturals, for example, 240053568 + ... + 240053573.

It is an arithmetic number, because the mean of its divisors is an integer number (480107142).

Almost surely, 2^1440321423 is an apocalyptic number.

1440321423 is a deficient number, since it is larger than the sum of its proper divisors (480107145).

1440321423 is an equidigital number, since it uses as much as digits as its factorization.

1440321423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480107144.

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

The square root of 1440321423 is about 37951.5668056011. The cubic root of 1440321423 is about 1129.3272480243.

Adding to 1440321423 its reverse (3241230441), we get a palindrome (4681551864).

The spelling of 1440321423 in words is "one billion, four hundred forty million, three hundred twenty-one thousand, four hundred twenty-three".