1440423256 has 16 divisors (see below), whose sum is σ = 2745069840. Its totient is φ = 708404640.

The previous prime is 1440423247. The next prime is 1440423287. The reversal of 1440423256 is 6523240441.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475356 + ... + 1476331.

It is an arithmetic number, because the mean of its divisors is an integer number (171566865).

Almost surely, 2^1440423256 is an apocalyptic number.

It is an amenable number.

1440423256 is a deficient number, since it is larger than the sum of its proper divisors (1304646584).

1440423256 is a wasteful number, since it uses less digits than its factorization.

1440423256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951754 (or 2951750 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1440423256 is about 37952.9083997524. The cubic root of 1440423256 is about 1129.3538624706.

Adding to 1440423256 its reverse (6523240441), we get a palindrome (7963663697).

The spelling of 1440423256 in words is "one billion, four hundred forty million, four hundred twenty-three thousand, two hundred fifty-six".