404404420 has 48 divisors (see below), whose sum is σ = 1004048640. Its totient is φ = 133870464.

The previous prime is 404404411. The next prime is 404404433. The reversal of 404404420 is 24404404.

It is a junction number, because it is equal to n+sod(n) for n = 404404391 and 404404400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45744 + ... + 53863.

It is an arithmetic number, because the mean of its divisors is an integer number (20917680).

Almost surely, 2^404404420 is an apocalyptic number.

It is an amenable number.

404404420 is an abundant number, since it is smaller than the sum of its proper divisors (599644220).

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

404404420 is a wasteful number, since it uses less digits than its factorization.

404404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99652 (or 99650 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 404404420 is about 20109.8090493172. The cubic root of 404404420 is about 739.5007711438.

Adding to 404404420 its reverse (24404404), we get a palindrome (428808824).

The spelling of 404404420 in words is "four hundred four million, four hundred four thousand, four hundred twenty".