Answer
528743
Work Step by Step
By using Expressing a Number’s Expanded Form as a Hindu-Arabic Numeral
=(5x$10^{5}$) + (2x$10^{4}$) + (8 x $10^{3}$) + (7 x $10^{2}$) + (4x$10^{1}$) + (3x1)
=(5x100000) + (2x10000) + (8x1000) + (7x 100) + (4x10) + (3x1)
= 500000 + 20000 + 8000 + 700 + 40 +3 =528743