No.
Cubic numbers are found by multiplying a numbers by itself three times.
E.g. 2 x 2 x 2 = 8 so 8 is a cubic number.
The closest cubic numbers to 38 are 27 (3 x 3 x 3) and 64 (4 x 4 x 4).
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Every real number is a cubic number: it is the cube of its cube root!
An object that is 38 inches wide by 19 inches deep by 68 inches long is 38 inches x 19 inches x 68 inches = 49,096 cubic inches in volume.A cubic foot is a cube that is one foot on an edge. That's 12 inches on an edge, so the cubic foot is 12 inches x 12 inches x 12 inches = 1728 cubic inches in volume.Our 49,096 cubic inches divided by 1728 cubic inches = about 22.43 cubic feet.
Estimate 1 x 2 x 3 feet = 6 cubic feet. Actual is 6 and 1/3 cubic feet 12 x 24 x 38 = 10944 cubic inches 10944 ÷ 1728 = 6.33333 repeating
38 + a number = 59 so the unknown number = 59 - 38 = 21
Yes, 38 is a whole number.