204240434 has 8 divisors (see below), whose sum is σ = 313832988. Its totient is φ = 99629440.

The previous prime is 204240433. The next prime is 204240469. The reversal of 204240434 is 434042402.

It can be written as a sum of positive squares in 2 ways, for example, as 159390625 + 44849809 = 12625^2 + 6697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204240433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1245287 + ... + 1245450.

Almost surely, 2^204240434 is an apocalyptic number.

204240434 is a deficient number, since it is larger than the sum of its proper divisors (109592554).

204240434 is a wasteful number, since it uses less digits than its factorization.

204240434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490780.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 204240434 is about 14291.2712520615. The cubic root of 204240434 is about 588.9077118913.

Adding to 204240434 its reverse (434042402), we get a palindrome (638282836).

The spelling of 204240434 in words is "two hundred four million, two hundred forty thousand, four hundred thirty-four".