404044402040 has 32 divisors (see below), whose sum is σ = 909132623280. Its totient is φ = 161611944192.

The previous prime is 404044402031. The next prime is 404044402043. The reversal of 404044402040 is 40204440404.

It is a happy number.

It is a super-2 number, since 2×404044402040² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404044402043) 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, 1045907 + ... + 1379133.

Almost surely, 2^404044402040 is an apocalyptic number.

404044402040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404044402040 is an abundant number, since it is smaller than the sum of its proper divisors (505088221240).

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

404044402040 is a wasteful number, since it uses less digits than its factorization.

404044402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363551 (or 363547 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 404044402040 its reverse (40204440404), we get a palindrome (444248842444).

It can be divided in two parts, 40404 and 4402040, that added together give a palindrome (4442444).

The spelling of 404044402040 in words is "four hundred four billion, forty-four million, four hundred two thousand, forty".