404440424 has 32 divisors (see below), whose sum is σ = 772156800. Its totient is φ = 198555840.

The previous prime is 404440423. The next prime is 404440427. The reversal of 404440424 is 424044404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 404440393 and 404440402.

It is not an unprimeable number, because it can be changed into a prime (404440423) 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, 151469 + ... + 154115.

It is an arithmetic number, because the mean of its divisors is an integer number (24129900).

Almost surely, 2^404440424 is an apocalyptic number.

It is an amenable number.

404440424 is a deficient number, since it is larger than the sum of its proper divisors (367716376).

404440424 is a wasteful number, since it uses less digits than its factorization.

404440424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993 (or 2989 counting only the distinct ones).

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

The square root of 404440424 is about 20110.7042144227. The cubic root of 404440424 is about 739.5227163339.

Adding to 404440424 its reverse (424044404), we get a palindrome (828484828).

The spelling of 404440424 in words is "four hundred four million, four hundred forty thousand, four hundred twenty-four".