1440423223 has 4 divisors (see below), whose sum is σ = 1450786120. Its totient is φ = 1430060328.

The previous prime is 1440423211. The next prime is 1440423233. The reversal of 1440423223 is 3223240441.

It is a happy number.

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 1440423223 - 2⁵ = 1440423191 is a prime.

It is a super-2 number, since 2×1440423223² = 4149638122715415458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440423233) 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, 5181240 + ... + 5181517.

It is an arithmetic number, because the mean of its divisors is an integer number (362696530).

Almost surely, 2^1440423223 is an apocalyptic number.

1440423223 is a deficient number, since it is larger than the sum of its proper divisors (10362897).

1440423223 is a wasteful number, since it uses less digits than its factorization.

1440423223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362896.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1440423223 is about 37952.9079650032. The cubic root of 1440423223 is about 1129.3538538461.

Adding to 1440423223 its reverse (3223240441), we get a palindrome (4663663664).

The spelling of 1440423223 in words is "one billion, four hundred forty million, four hundred twenty-three thousand, two hundred twenty-three".