404402424 has 32 divisors (see below), whose sum is σ = 1011543120. Its totient is φ = 134729216.

The previous prime is 404402387. The next prime is 404402437. The reversal of 404402424 is 424204404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 404402394 and 404402403.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 61504 + ... + 67760.

Almost surely, 2^404402424 is an apocalyptic number.

It is an amenable number.

404402424 is an abundant number, since it is smaller than the sum of its proper divisors (607140696).

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

404402424 is a wasteful number, since it uses less digits than its factorization.

404402424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8959 (or 8955 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 404402424 is about 20109.7594217335. The cubic root of 404402424 is about 739.4995545020.

Adding to 404402424 its reverse (424204404), we get a palindrome (828606828).

The spelling of 404402424 in words is "four hundred four million, four hundred two thousand, four hundred twenty-four".