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Calculate Excel Column Name By Number Using Powershell.

function Get-ExcelCol{
param( [int]$Number)
end{
    [string]$res=""
    while($Number -gt 0 ) {
        $res= [System.Convert]::ToChar((($Number-1) % 26)  +65 ) +$res
        $Number=($Number-(($Number-1) % 26))/26
        
        } 
        $res
    }

}

Result:

PS C:\> Get-ExcelCol 26
Z

PS C:\> Get-ExcelCol 27
AA

PS C:\> Get-ExcelCol 52
AZ

PS C:\> Get-ExcelCol 53
BA