205030578 has 16 divisors (see below), whose sum is σ = 413291520. Its totient is φ = 67805136.

The previous prime is 205030561. The next prime is 205030597. The reversal of 205030578 is 875030502.

It is a happy number.

205030578 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 133773 + ... + 135296.

It is an arithmetic number, because the mean of its divisors is an integer number (25830720).

Almost surely, 2^205030578 is an apocalyptic number.

205030578 is an abundant number, since it is smaller than the sum of its proper divisors (208260942).

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

205030578 is a wasteful number, since it uses less digits than its factorization.

205030578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269201.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 205030578 is about 14318.8888535389. Note that the first 4 decimals coincide. The cubic root of 205030578 is about 589.6661694756. Note that the first 3 decimals are identical.

The spelling of 205030578 in words is "two hundred five million, thirty thousand, five hundred seventy-eight".