404442424 has 8 divisors (see below), whose sum is σ = 758329560. Its totient is φ = 202221208.

The previous prime is 404442421. The next prime is 404442469. The reversal of 404442424 is 424244404.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 404442392 and 404442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404442421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25277644 + ... + 25277659.

It is an arithmetic number, because the mean of its divisors is an integer number (94791195).

Almost surely, 2^404442424 is an apocalyptic number.

It is an amenable number.

404442424 is a deficient number, since it is larger than the sum of its proper divisors (353887136).

404442424 is a wasteful number, since it uses less digits than its factorization.

404442424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50555309 (or 50555305 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

The square root of 404442424 is about 20110.7539391242. The cubic root of 404442424 is about 739.5239353375.

Adding to 404442424 its reverse (424244404), we get a palindrome (828686828).

The spelling of 404442424 in words is "four hundred four million, four hundred forty-two thousand, four hundred twenty-four".