The Milton Fine version had powerful telepathic and psychokinetic abilities.
The various robotic versions had technopathic abilities
All versions of the character have a 12th level Coluan intellect.
The Milton Fine version had the strength of an adult human male who engaged in moderate infrequent exercise.
The original version possesses superhuman class 100+ strength, capable of combating Superman, provided he remained in proximity to his spacecraft.
The original version seems to suffer from some version of mysophobia
Brainiac's Skull Ship