<p>给你一个整数 <code>columnNumber</code> ,返回它在 Excel 表中相对应的列名称。</p>

<p>例如:</p>

<pre>
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28 
...
</pre>

<p> </p>

<p><strong>示例 1:</strong></p>

<pre>
<strong>输入:</strong>columnNumber = 1
<strong>输出:</strong>"A"
</pre>

<p><strong>示例 2:</strong></p>

<pre>
<strong>输入:</strong>columnNumber = 28
<strong>输出:</strong>"AB"
</pre>

<p><strong>示例 3:</strong></p>

<pre>
<strong>输入:</strong>columnNumber = 701
<strong>输出:</strong>"ZY"
</pre>

<p><strong>示例 4:</strong></p>

<pre>
<strong>输入:</strong>columnNumber = 2147483647
<strong>输出:</strong>"FXSHRXW"
</pre>

<p> </p>

<p><strong>提示:</strong></p>

<ul>
	<li><code>1 <= columnNumber <= 2<sup>31</sup> - 1</code></li>
</ul>