404404220424 has 32 divisors (see below), whose sum is σ = 1027584498240. Its totient is φ = 132591547200.

The previous prime is 404404220383. The next prime is 404404220431. The reversal of 404404220424 is 424022404404.

It is a junction number, because it is equal to n+sod(n) for n = 404404220391 and 404404220400.

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 7 ways as a sum of consecutive naturals, for example, 138114732 + ... + 138117659.

It is an arithmetic number, because the mean of its divisors is an integer number (32112015570).

Almost surely, 2^404404220424 is an apocalyptic number.

It is an amenable number.

404404220424 is an abundant number, since it is smaller than the sum of its proper divisors (623180277816).

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

404404220424 is a wasteful number, since it uses less digits than its factorization.

404404220424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276232461 (or 276232457 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 404404220424 its reverse (424022404404), we get a palindrome (828426624828).

The spelling of 404404220424 in words is "four hundred four billion, four hundred four million, two hundred twenty thousand, four hundred twenty-four".