\[\boxed{\mathbf{829}.}\]
\[1)\log_{3}x < 2\]
\[\log_{3}x < \log_{3}\left( 3^{2} \right)\]
\[\log_{3}x < \log_{3}9\]
\[a = 3 > 1:\]
\[0 < x < 9.\]
\[2)\log_{0,4}x > 2\]
\[\log_{0,4}x > \log_{0,4}(0,4)^{2}\]
\[\log_{0,4}x > \log_{0,4}(0,16)\]
\[a = 0,4 < 1:\]
\[0 < x < 0,16.\]
\[3)\log_{\frac{1}{2}}x \geq 16\]
\[\log_{\frac{1}{2}}x \geq \log_{\frac{1}{2}}\left( \frac{1}{2} \right)^{16}\]
\[\log_{\frac{1}{2}}x \geq \log_{\frac{1}{2}}\ \left( \frac{1}{65536} \right)\]
\[a = \frac{1}{2} > 0:\]
\[0 < x \leq \frac{1}{65536}.\]
\[4)\log_{0,4}x \leq 2\]
\[\log_{0,4}x \leq 2\]
\[\log_{0,4}x \leq \log_{0,4}(0,4)^{2}\]
\[\log_{0,4}x \leq \log_{0,4}(0,16)\]
\[a = 0,4 < 1:\]
\[x \geq 0,16.\]