404320220 has 24 divisors (see below), whose sum is σ = 885989664. Its totient is φ = 154696256.

The previous prime is 404320219. The next prime is 404320223. The reversal of 404320220 is 22023404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404320223) 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, 439019 + ... + 439938.

It is an arithmetic number, because the mean of its divisors is an integer number (36916236).

Almost surely, 2^404320220 is an apocalyptic number.

It is an amenable number.

404320220 is an abundant number, since it is smaller than the sum of its proper divisors (481669444).

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

404320220 is a wasteful number, since it uses less digits than its factorization.

404320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878989 (or 878987 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 404320220 is about 20107.7154346286. The cubic root of 404320220 is about 739.4494443995.

Adding to 404320220 its reverse (22023404), we get a palindrome (426343624).

The spelling of 404320220 in words is "four hundred four million, three hundred twenty thousand, two hundred twenty".