1444743845 has 4 divisors (see below), whose sum is σ = 1733692620. Its totient is φ = 1155795072.

The previous prime is 1444743841. The next prime is 1444743851. The reversal of 1444743845 is 5483474441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1013849281 + 430894564 = 31841^2 + 20758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444743845 - 2² = 1444743841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1444743796 and 1444743805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444743841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144474380 + ... + 144474389.

It is an arithmetic number, because the mean of its divisors is an integer number (433423155).

Almost surely, 2^1444743845 is an apocalyptic number.

It is an amenable number.

1444743845 is a deficient number, since it is larger than the sum of its proper divisors (288948775).

1444743845 is an equidigital number, since it uses as much as digits as its factorization.

1444743845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288948774.

The product of its digits is 860160, while the sum is 44.

The square root of 1444743845 is about 38009.7861740894. The cubic root of 1444743845 is about 1130.4819112955.

The spelling of 1444743845 in words is "one billion, four hundred forty-four million, seven hundred forty-three thousand, eight hundred forty-five".