204643442 has 8 divisors (see below), whose sum is σ = 311288832. Its totient is φ = 100880500.

The previous prime is 204643429. The next prime is 204643457. The reversal of 204643442 is 244346402.

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

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 3 ways as a sum of consecutive naturals, for example, 720434 + ... + 720717.

It is an arithmetic number, because the mean of its divisors is an integer number (38911104).

Almost surely, 2^204643442 is an apocalyptic number.

204643442 is a deficient number, since it is larger than the sum of its proper divisors (106645390).

204643442 is a wasteful number, since it uses less digits than its factorization.

204643442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441224.

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 204643442 is about 14305.3640988267. The cubic root of 204643442 is about 589.2948023778.

Adding to 204643442 its reverse (244346402), we get a palindrome (448989844).

The spelling of 204643442 in words is "two hundred four million, six hundred forty-three thousand, four hundred forty-two".