1440423 has 10 divisors (see below), whose sum is σ = 2151864. Its totient is φ = 960228.

The previous prime is 1440419. The next prime is 1440437. The reversal of 1440423 is 3240441.

It is not a de Polignac number, because 1440423 - 2² = 1440419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440396 and 1440405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440403) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8811 + ... + 8972.

2^1440423 is an apocalyptic number.

1440423 is a deficient number, since it is larger than the sum of its proper divisors (711441).

1440423 is an equidigital number, since it uses as much as digits as its factorization.

1440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17795 (or 17786 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1440423 is about 1200.1762370585. The cubic root of 1440423 is about 112.9353795566.

Adding to 1440423 its sum of digits (18), we get a palindrome (1440441).

Adding to 1440423 its reverse (3240441), we get a palindrome (4680864).

The spelling of 1440423 in words is "one million, four hundred forty thousand, four hundred twenty-three".