404222220 has 36 divisors (see below), whose sum is σ = 1226141280. Its totient is φ = 107792544.

The previous prime is 404222219. The next prime is 404222251. The reversal of 404222220 is 22222404.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 404222193 and 404222202.

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 11 ways as a sum of consecutive naturals, for example, 1122660 + ... + 1123019.

It is an arithmetic number, because the mean of its divisors is an integer number (34059480).

Almost surely, 2^404222220 is an apocalyptic number.

It is an amenable number.

404222220 is an abundant number, since it is smaller than the sum of its proper divisors (821919060).

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

404222220 is a wasteful number, since it uses less digits than its factorization.

404222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245694 (or 2245689 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404222220 is about 20105.2784114023. The cubic root of 404222220 is about 739.3896964591.

Adding to 404222220 its reverse (22222404), we get a palindrome (426444624).

It can be divided in two parts, 4042 and 22220, that added together give a palindrome (26262).

The spelling of 404222220 in words is "four hundred four million, two hundred twenty-two thousand, two hundred twenty".