204400004 has 18 divisors (see below), whose sum is σ = 370465914. Its totient is φ = 98674240.

The previous prime is 204399997. The next prime is 204400037. The reversal of 204400004 is 400004402.

It can be written as a sum of positive squares in 3 ways, for example, as 78287104 + 126112900 = 8848^2 + 11230^2 .

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 5 ways as a sum of consecutive naturals, for example, 27017 + ... + 33744.

Almost surely, 2^204400004 is an apocalyptic number.

It is an amenable number.

204400004 is a deficient number, since it is larger than the sum of its proper divisors (166065910).

204400004 is a wasteful number, since it uses less digits than its factorization.

204400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60823 (or 60792 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204400004 is about 14296.8529404201. The cubic root of 204400004 is about 589.0610402331.

Adding to 204400004 its reverse (400004402), we get a palindrome (604404406).

The spelling of 204400004 in words is "two hundred four million, four hundred thousand, four".