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58 (number)
58 (fifty-eight) is the natural number following 57 and preceding 59. ==In mathematics==
Fifty-eight has an aliquot sum of 32 and is the second composite member of the 31-aliquot tree. Fifty-eight is the sum of the first seven prime numbers, an 11-gonal number, and a Smith number. Given 58, the Mertens function returns 0. There is no solution to the equation ''x'' - φ(''x'') = 58, making 58 a noncototient. However, the sum of the totient function for the first thirteen integers is 58.
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