I have a float number such as x=23392342.1

I would like to convert it to a string with engineering notation (with metric prefix)

http://en.wikipedia.org/wiki/Engineering_notation http://en.wikipedia.org/wiki/Metric_prefix

So in my example 23392342.1 = 23.3923421E6 = 23.3923421 M (mega)

I would like to display 23.3923421 M

python string numbers
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