The only even Prime number is 2.
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128 = 27. You can find out this sort of things quickly if you take the trouble to divide the number into prime factors.
The prime factorization of the number 58 is 2 x 29, where 2 is a prime number and 29 is a prime number. The prime factorization of the number 128 is 2^7, where 2 is a prime number raised to the 7th power.
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128 is a square number 128 is a square number
The least common multiple (LCM) of 40, 80, and 128 is 640. To find the LCM, you can find the prime factors of each number and then take the highest power of each prime factor that appears in any of the numbers. In this case, the prime factorization of 40 is 2^3 * 5, the prime factorization of 80 is 2^4 * 5, and the prime factorization of 128 is 2^7. Taking the highest powers, we get 2^7 * 5 = 640.