1443440401 has 4 divisors (see below), whose sum is σ = 1554474292. Its totient is φ = 1332406512.

The previous prime is 1443440387. The next prime is 1443440419. The reversal of 1443440401 is 1040443441.

It is a happy number.

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 534719376 + 908721025 = 23124^2 + 30145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1443440401 - 2¹⁹ = 1442916113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1443440701) 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, 55516926 + ... + 55516951.

It is an arithmetic number, because the mean of its divisors is an integer number (388618573).

Almost surely, 2^1443440401 is an apocalyptic number.

It is an amenable number.

1443440401 is a deficient number, since it is larger than the sum of its proper divisors (111033891).

1443440401 is a wasteful number, since it uses less digits than its factorization.

1443440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111033890.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1443440401 is about 37992.6361417578. The cubic root of 1443440401 is about 1130.1418364264.

Adding to 1443440401 its reverse (1040443441), we get a palindrome (2483883842).

The spelling of 1443440401 in words is "one billion, four hundred forty-three million, four hundred forty thousand, four hundred one".