1044320405 has 32 divisors (see below), whose sum is σ = 1354917888. Its totient is φ = 770457600.

The previous prime is 1044320383. The next prime is 1044320413. The reversal of 1044320405 is 5040234401.

It is not a de Polignac number, because 1044320405 - 2²⁶ = 977211541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1628885 + ... + 1629525.

It is an arithmetic number, because the mean of its divisors is an integer number (42341184).

Almost surely, 2^1044320405 is an apocalyptic number.

It is an amenable number.

1044320405 is a deficient number, since it is larger than the sum of its proper divisors (310597483).

1044320405 is a wasteful number, since it uses less digits than its factorization.

1044320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1044320405 is about 32315.9466053526. The cubic root of 1044320405 is about 1014.5604331523.

Adding to 1044320405 its reverse (5040234401), we get a palindrome (6084554806).

The spelling of 1044320405 in words is "one billion, forty-four million, three hundred twenty thousand, four hundred five".