404044040420 has 24 divisors (see below), whose sum is σ = 849222105984. Its totient is φ = 161478640736.

The previous prime is 404044040383. The next prime is 404044040453. The reversal of 404044040420 is 24040440404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 404044040420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8662124 + ... + 8708643.

It is an arithmetic number, because the mean of its divisors is an integer number (35384254416).

Almost surely, 2^404044040420 is an apocalyptic number.

It is an amenable number.

404044040420 is an abundant number, since it is smaller than the sum of its proper divisors (445178065564).

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

404044040420 is a wasteful number, since it uses less digits than its factorization.

404044040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17371939 (or 17371937 counting only the distinct ones).

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

Adding to 404044040420 its reverse (24040440404), we get a palindrome (428084480824).

The spelling of 404044040420 in words is "four hundred four billion, forty-four million, forty thousand, four hundred twenty".