204005430 has 48 divisors (see below), whose sum is σ = 548711280. Its totient is φ = 52524864.

The previous prime is 204005429. The next prime is 204005437. The reversal of 204005430 is 34500402.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204005437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36472 + ... + 41691.

It is an arithmetic number, because the mean of its divisors is an integer number (11431485).

Almost surely, 2^204005430 is an apocalyptic number.

204005430 is an abundant number, since it is smaller than the sum of its proper divisors (344705850).

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

204005430 is a wasteful number, since it uses less digits than its factorization.

204005430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78205 (or 78202 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 204005430 is about 14283.0469438422. The cubic root of 204005430 is about 588.6817547034.

Adding to 204005430 its reverse (34500402), we get a palindrome (238505832).

The spelling of 204005430 in words is "two hundred four million, five thousand, four hundred thirty".