problem with bitwise OR

Question

I have this code, in which I try to "glue" four bytes in order to construct an unsigned int. I shift left the bytes and "add" them using the OR operator.

unsigned long number1; 
unsigned long number2;
unsigned long number3=0;
byte byte0 = 1;
byte byte1 = 40;
byte byte2 = 107;
byte byte3 = 238;
void setup(){
 Serial.begin(9600);
}
void loop(){
 number1 = byte1 <<8 | byte0 ; //(=10.241 O.K.)
 //(should be 4.000.000.001, it produces 10.241)
 number2 = byte3 <<24 | byte2 <<16 | byte1 <<8 | byte0; 
 //(should be 4.000.000.001, it produces 4.016.777.217)
 number3 = number3 | byte3;
 number3 = number3<<8;
 number3 = number3 | byte2;
 number3 = number3<<8;
 number3 = number3 | byte1;
 number3 = number3<<8;
 number3 = number3 | byte0; 
 Serial.print("number1 = ");Serial.println(number1); 
 Serial.print("number2 = ");Serial.println(number2); 
 Serial.print("number3 = ");Serial.println(number3); 
 Serial.println(" "); 
}

The problem is that the OR operator applies only to byte1 <<8 | byte0 and ignores the rest. That is number1 and number2 appear to have the same value (10241).

I also tried "adding" them up separately, as shown with number3, but it also produces a wrong result as well.

I tried the same code in python, and it works fine.

byte3, byte2, byte1, byte0 = 238, 107, 40, 1
print byte1 <<8 | byte0
print byte3 <<24 | byte2 <<16 | byte1 <<8 | byte0
number3 = 0;
number3 = number3 | byte3;
number3 = number3<<8;
number3 = number3 | byte2;
number3 = number3<<8;
number3 = number3 | byte1;
number3 = number3<<8;
number3 = number3 | byte0;
print number3

So, the question is:

Why both number2 and number3 produce a false result?

Answer 1

Correction from another answer for number2:

number2 = (unsigned long)byte3 <<24 | (unsigned long)byte2 <<16 | byte1 <<8 | byte0; // = 4.000.000.001

And in the first round of loop number3 is correct, all others are wrong as number3 holds a result from previous loop.

 number3 = byte3; // all magic lays here
 number3 <<= 8;
 number3 |= byte2;
 number3 <<= 8;
 number3 |= byte1;
 number3 <<= 8;
 number3 |= byte0;

• user3060854: Correction for number two works fine. As for number3, I should be more careful and reset number3 in every loop. Thank you.