204404022 has 24 divisors (see below), whose sum is σ = 468927576. Its totient is φ = 64126656.

The previous prime is 204404009. The next prime is 204404027. The reversal of 204404022 is 220404402.

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 = 204403986 and 204404004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204404027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333688 + ... + 334299.

It is an arithmetic number, because the mean of its divisors is an integer number (19538649).

Almost surely, 2^204404022 is an apocalyptic number.

204404022 is an abundant number, since it is smaller than the sum of its proper divisors (264523554).

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

204404022 is a wasteful number, since it uses less digits than its factorization.

204404022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668012 (or 668009 counting only the distinct ones).

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

The square root of 204404022 is about 14296.9934601650. The cubic root of 204404022 is about 589.0649000369.

Adding to 204404022 its reverse (220404402), we get a palindrome (424808424).

The spelling of 204404022 in words is "two hundred four million, four hundred four thousand, twenty-two".