def russell_index_num_to_alpha(num):
return RussellIndex()._to_alpha(num)<EOL>
Convert the Russell Index integer to an alphabetic string.

    This is a wrapper for :py:meth:`RussellIndex._to_alpha`.

    Parameters
    ----------
    num : int
        A Russell Index integer value

    Returns
    -------
    str
        The Russell Index as an alphabetic string

    Examples
    --------
    >>> russell_index_num_to_alpha(3813428)
    'CRACDBR'
    >>> russell_index_num_to_alpha(715)
    'NAL'
    >>> russell_index_num_to_alpha(3614)
    'CMAD'