404044440040 has 32 divisors (see below), whose sum is σ = 931273164360. Its totient is φ = 157675878400.

The previous prime is 404044439987. The next prime is 404044440049. The reversal of 404044440040 is 40044440404.

It can be written as a sum of positive squares in 4 ways, for example, as 199796484196 + 204247955844 = 446986^2 + 451938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404044439990 and 404044440008.

It is not an unprimeable number, because it can be changed into a prime (404044440049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123182641 + ... + 123185920.

Almost surely, 2^404044440040 is an apocalyptic number.

404044440040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404044440040 is an abundant number, since it is smaller than the sum of its proper divisors (527228724320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404044440040 is a wasteful number, since it uses less digits than its factorization.

404044440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246368613 (or 246368609 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 404044440040 its reverse (40044440404), we get a palindrome (444088880444).

The spelling of 404044440040 in words is "four hundred four billion, forty-four million, four hundred forty thousand, forty".