205434730 has 32 divisors (see below), whose sum is σ = 385491456. Its totient is φ = 78750144.

The previous prime is 205434727. The next prime is 205434739. The reversal of 205434730 is 37434502.

It is not an unprimeable number, because it can be changed into a prime (205434739) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20647 + ... + 28933.

It is an arithmetic number, because the mean of its divisors is an integer number (12046608).

Almost surely, 2^205434730 is an apocalyptic number.

205434730 is a deficient number, since it is larger than the sum of its proper divisors (180056726).

205434730 is a wasteful number, since it uses less digits than its factorization.

205434730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8398.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 205434730 is about 14332.9944533583. The cubic root of 205434730 is about 590.0533610648.

The spelling of 205434730 in words is "two hundred five million, four hundred thirty-four thousand, seven hundred thirty".