The correct option is 347.

To identify the incorrect number in the given sequence, let us analyze the differences between consecutive terms:

First term = 448
Second term = 448
Difference = 448 - 448 = 0

Third term = 447
Difference = 448 - 447 = 1

Fourth term = 439
Difference = 447 - 439 = 8

Fifth term = 412
Difference = 439 - 412 = 27

Notice the pattern in the differences between consecutive terms:

$0^3=0$

$1^3=1$

$2^3=8$

$3^3=27$

Following this pattern, the next difference should be $4^3=64$.

Therefore, the sixth term should be:

$412-64=348$

However, the sequence given in the question lists 347 instead of 348.

We can check the final term using 348:

The next difference should be $5^3=125$.

$348-125=223$

This matches the last number in the given sequence. Thus, 347 is the incorrect number in the sequence.