1440668726 has 16 divisors (see below), whose sum is σ = 2511578880. Its totient is φ = 606964200.

The previous prime is 1440668707. The next prime is 1440668729. The reversal of 1440668726 is 6278660441.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440668729) 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 7 ways as a sum of consecutive naturals, for example, 871250 + ... + 872901.

It is an arithmetic number, because the mean of its divisors is an integer number (156973680).

Almost surely, 2^1440668726 is an apocalyptic number.

1440668726 is a deficient number, since it is larger than the sum of its proper divisors (1070910154).

1440668726 is a wasteful number, since it uses less digits than its factorization.

1440668726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744219.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 1440668726 is about 37956.1421379992. The cubic root of 1440668726 is about 1129.4180118437.

The spelling of 1440668726 in words is "one billion, four hundred forty million, six hundred sixty-eight thousand, seven hundred twenty-six".