1440448493 has 6 divisors (see below), whose sum is σ = 1583303022. Its totient is φ = 1309498520.

The previous prime is 1440448489. The next prime is 1440448523. The reversal of 1440448493 is 3948440441.

It can be written as a sum of positive squares in only one way, i.e., 1005016804 + 435431689 = 31702^2 + 20867^2 .

It is not a de Polignac number, because 1440448493 - 2² = 1440448489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1440448493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440448423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5952146 + ... + 5952387.

It is an arithmetic number, because the mean of its divisors is an integer number (263883837).

Almost surely, 2^1440448493 is an apocalyptic number.

It is an amenable number.

1440448493 is a deficient number, since it is larger than the sum of its proper divisors (142854529).

1440448493 is a wasteful number, since it uses less digits than its factorization.

1440448493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904555 (or 11904544 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 1440448493 is about 37953.2408761096. The cubic root of 1440448493 is about 1129.3604580637.

The spelling of 1440448493 in words is "one billion, four hundred forty million, four hundred forty-eight thousand, four hundred ninety-three".