404412220 has 48 divisors (see below), whose sum is σ = 910179648. Its totient is φ = 150543360.

The previous prime is 404412209. The next prime is 404412223. The reversal of 404412220 is 22214404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404412223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5140 + ... + 28900.

It is an arithmetic number, because the mean of its divisors is an integer number (18962076).

Almost surely, 2^404412220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404412220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455089824).

404412220 is an abundant number, since it is smaller than the sum of its proper divisors (505767428).

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

404412220 is a wasteful number, since it uses less digits than its factorization.

404412220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23830 (or 23828 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 404412220 is about 20110.0029835900. The cubic root of 404412220 is about 739.5055255173.

Adding to 404412220 its reverse (22214404), we get a palindrome (426626624).

The spelling of 404412220 in words is "four hundred four million, four hundred twelve thousand, two hundred twenty".