404404040440 has 32 divisors (see below), whose sum is σ = 909992188080. Its totient is φ = 161746843392.

The previous prime is 404404040423. The next prime is 404404040531. The reversal of 404404040440 is 44040404404.

It is a junction number, because it is equal to n+sod(n) for n = 404404040399 and 404404040408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12789 + ... + 899428.

Almost surely, 2^404404040440 is an apocalyptic number.

404404040440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404404040440 is an abundant number, since it is smaller than the sum of its proper divisors (505588147640).

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

404404040440 is a wasteful number, since it uses less digits than its factorization.

404404040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923311 (or 923307 counting only the distinct ones).

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

Adding to 404404040440 its reverse (44040404404), we get a palindrome (448444444844).

The spelling of 404404040440 in words is "four hundred four billion, four hundred four million, forty thousand, four hundred forty".