205506730 has 32 divisors (see below), whose sum is σ = 434585088. Its totient is φ = 68980800.

The previous prime is 205506689. The next prime is 205506739. The reversal of 205506730 is 37605502.

205506730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (205506739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70426 + ... + 73285.

It is an arithmetic number, because the mean of its divisors is an integer number (13580784).

Almost surely, 2^205506730 is an apocalyptic number.

205506730 is an abundant number, since it is smaller than the sum of its proper divisors (229078358).

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

205506730 is a wasteful number, since it uses less digits than its factorization.

205506730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143742.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 205506730 is about 14335.5059206154. The cubic root of 205506730 is about 590.1222862489.

The spelling of 205506730 in words is "two hundred five million, five hundred six thousand, seven hundred thirty".