404440310420 has 12 divisors (see below), whose sum is σ = 849324651924. Its totient is φ = 161776124160.

The previous prime is 404440310399. The next prime is 404440310453. The reversal of 404440310420 is 24013044404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 234099210244 + 170341100176 = 483838^2 + 412724^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404440310420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10111007741 + ... + 10111007780.

It is an arithmetic number, because the mean of its divisors is an integer number (70777054327).

Almost surely, 2^404440310420 is an apocalyptic number.

It is an amenable number.

404440310420 is an abundant number, since it is smaller than the sum of its proper divisors (444884341504).

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

404440310420 is a wasteful number, since it uses less digits than its factorization.

404440310420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20222015530 (or 20222015528 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 404440310420 its reverse (24013044404), we get a palindrome (428453354824).

The spelling of 404440310420 in words is "four hundred four billion, four hundred forty million, three hundred ten thousand, four hundred twenty".