404444420404 has 12 divisors (see below), whose sum is σ = 708326835300. Its totient is φ = 202065324608.

The previous prime is 404444420399. The next prime is 404444420407. The reversal of 404444420404 is 404024444404.

It can be written as a sum of positive squares in 2 ways, for example, as 136679568804 + 267764851600 = 369702^2 + 517460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404444420404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404444420407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39215599 + ... + 39225910.

It is an arithmetic number, because the mean of its divisors is an integer number (59027236275).

Almost surely, 2^404444420404 is an apocalyptic number.

It is an amenable number.

404444420404 is a deficient number, since it is larger than the sum of its proper divisors (303882414896).

404444420404 is a wasteful number, since it uses less digits than its factorization.

404444420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78442802 (or 78442800 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 404444420404 its reverse (404024444404), we get a palindrome (808468864808).

The spelling of 404444420404 in words is "four hundred four billion, four hundred forty-four million, four hundred twenty thousand, four hundred four".