Up until now, I saw Christianity as a whole to be monotheistic (there is only one god that created the world, is all-powerful and intervenes in the world).
Whilst looking at monotheism and henotheism (belief in a single god while not denying the existence or possible existence of other deities and any other deities are viewed to be of a unitary, equivalent divine essence), Wikipedia's article on henotheism states that
Some scholars have written that The Church of Jesus Christ of Latter-day Saints (LDS Church) can be characterized as henotheistic, but others have rejected this stance.
Eugene England, a professor at Brigham Young University, asserted that LDS Presidents Brigham Young and Joseph Fielding Smith along with LDS scholar B. H. Roberts used the LDS interpretation of 1 Corinthians 8:5–6 as "a brief explanation of how it is possible to be both a Christian polytheist (technically a henotheist) and a monotheist".
1 Corinthians 8:5-6 reads (NIV)
5 For even if there are so-called gods, whether in heaven or on earth (as indeed there are many “gods” and many “lords”), 6 yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.
What does the LDS church say about it? Are Latter Day Saints monotheistic or henotheistic?