205443730 has 16 divisors (see below), whose sum is σ = 375862104. Its totient is φ = 80830080.

The previous prime is 205443703. The next prime is 205443731. The reversal of 205443730 is 37344502.

205443730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 152547201 + 52896529 = 12351^2 + 7273^2 .

It is not an unprimeable number, because it can be changed into a prime (205443731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167787 + ... + 169006.

Almost surely, 2^205443730 is an apocalyptic number.

205443730 is a deficient number, since it is larger than the sum of its proper divisors (170418374).

205443730 is a wasteful number, since it uses less digits than its factorization.

205443730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336861.

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

The square root of 205443730 is about 14333.3084108310. The cubic root of 205443730 is about 590.0619775934.

The spelling of 205443730 in words is "two hundred five million, four hundred forty-three thousand, seven hundred thirty".