404420022 has 48 divisors (see below), whose sum is σ = 910718640. Its totient is φ = 129546816.

The previous prime is 404420011. The next prime is 404420069. The reversal of 404420022 is 220024404.

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 = 404419977 and 404420004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116788 + ... + 120200.

It is an arithmetic number, because the mean of its divisors is an integer number (18973305).

Almost surely, 2^404420022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404420022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455359320).

404420022 is an abundant number, since it is smaller than the sum of its proper divisors (506298618).

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

404420022 is a wasteful number, since it uses less digits than its factorization.

404420022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3674 counting only the distinct ones).

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

The square root of 404420022 is about 20110.1969657187. The cubic root of 404420022 is about 739.5102810486.

Adding to 404420022 its reverse (220024404), we get a palindrome (624444426).

The spelling of 404420022 in words is "four hundred four million, four hundred twenty thousand, twenty-two".