Required information

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Shown below is information relating to the stockholders' equity of Brookdale Corporation at December 31, 2018:

11% cumulative preferred stock, $130 par, 100,000 shares authorized, 10,000 shares issued	$	1,300,000
Common stock, $1.25 par, 1,000,000 shares authorized, 600,000 shares issued (of which 6,000 are held in treasury)		750,000
Additional paid-in capital: preferred stock		500,000
Additional paid-in capital: common stock		900,000
Additional paid-in capital: treasury stock transactions		6,000
Treasury stock (at cost: 6,000 common shares)		(192,000	)
Retained earnings		1,350,000

How many shares of common stock are outstanding?