205434330 has 16 divisors (see below), whose sum is σ = 493042464. Its totient is φ = 54782480.

The previous prime is 205434293. The next prime is 205434391. The reversal of 205434330 is 33434502.

It is a self number, because there is not a number n which added to its sum of digits gives 205434330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3423876 + ... + 3423935.

It is an arithmetic number, because the mean of its divisors is an integer number (30815154).

Almost surely, 2^205434330 is an apocalyptic number.

205434330 is an abundant number, since it is smaller than the sum of its proper divisors (287608134).

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

205434330 is a wasteful number, since it uses less digits than its factorization.

205434330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847821.

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 205434330 is about 14332.9804995332. The cubic root of 205434330 is about 590.0529781021.

Adding to 205434330 its reverse (33434502), we get a palindrome (238868832).

The spelling of 205434330 in words is "two hundred five million, four hundred thirty-four thousand, three hundred thirty".