404224220 has 48 divisors (see below), whose sum is σ = 866533248. Its totient is φ = 158361600.

The previous prime is 404224217. The next prime is 404224237. The reversal of 404224220 is 22422404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 404224192 and 404224201.

It is a congruent number.

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, 194909 + ... + 196971.

It is an arithmetic number, because the mean of its divisors is an integer number (18052776).

Almost surely, 2^404224220 is an apocalyptic number.

It is an amenable number.

404224220 is an abundant number, since it is smaller than the sum of its proper divisors (462309028).

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

404224220 is a wasteful number, since it uses less digits than its factorization.

404224220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 404224220 is about 20105.3281495230. The cubic root of 404224220 is about 739.3909159013.

Adding to 404224220 its reverse (22422404), we get a palindrome (426646624).

The spelling of 404224220 in words is "four hundred four million, two hundred twenty-four thousand, two hundred twenty".