204400242 has 24 divisors (see below), whose sum is σ = 453168144. Its totient is φ = 66548664.

The previous prime is 204400187. The next prime is 204400253. The reversal of 204400242 is 242004402.

204400242 is a `hidden beast` number, since 20 + 4 + 400 + 242 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131268 + ... + 132815.

It is an arithmetic number, because the mean of its divisors is an integer number (18882006).

Almost surely, 2^204400242 is an apocalyptic number.

204400242 is an abundant number, since it is smaller than the sum of its proper divisors (248767902).

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

204400242 is a wasteful number, since it uses less digits than its factorization.

204400242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264134 (or 264131 counting only the distinct ones).

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

The square root of 204400242 is about 14296.8612639278. The cubic root of 204400242 is about 589.0612688640.

Adding to 204400242 its reverse (242004402), we get a palindrome (446404644).

The spelling of 204400242 in words is "two hundred four million, four hundred thousand, two hundred forty-two".