404440000040 has 16 divisors (see below), whose sum is σ = 909990000180. Its totient is φ = 161776000000.

The previous prime is 404440000033. The next prime is 404440000057. The reversal of 404440000040 is 40000044404.

It can be written as a sum of positive squares in 2 ways, for example, as 390082688356 + 14357311684 = 624566^2 + 119822^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 404439999967 and 404440000021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055499961 + ... + 5055500040.

Almost surely, 2^404440000040 is an apocalyptic number.

404440000040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404440000040 is an abundant number, since it is smaller than the sum of its proper divisors (505550000140).

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

404440000040 is a wasteful number, since it uses less digits than its factorization.

404440000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111000012 (or 10111000008 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 404440000040 its reverse (40000044404), we get a palindrome (444440044444).

The spelling of 404440000040 in words is "four hundred four billion, four hundred forty million, forty", and thus it is an aban number.