Yes, 123456789 is a multiple of 9
1, 3 and 9
Nope, its factors are: 1, 3, 9, 3607, 3803, 10821, 11409, 32463, 34227, 13717421, 41152263, 123456789.
1, 3, 9, 3607, 3803, 10821, 11409, 32463, 34227, 13717421, 41152263, 123456789 3, 3607 and 3803 are prime.
Yes, 324 is a multiple of 9 (324/9 = 36).
4 is a multiple of 2. 9 is a multiple of 3.
15,241,578,750,190,521
1, 3 and 9
Yes, 123456789 is a multiple of 3. To find out if it's a multiple of 3, you add the digits. In this case you would add 1+2+3+4+5+6+7+8+9=45. Now you take that 45 and divide by 3. If there is no remainder it is a multiple but if there is a remainder it is not a multiple. So in this case 45/3=15 with no remainder.
Any multiple of 2520.
1,111,111,101
3 and 9. And they divide into 123456789 whether or not you use divisibility rules!
123456789 + 123456789 = 246913578
123456789
Nope, its factors are: 1, 3, 9, 3607, 3803, 10821, 11409, 32463, 34227, 13717421, 41152263, 123456789.
45 and 45/5 = 9
123456789+987654321+123456789+987654321=100
A number divisible by 123456789 must be 0 or bigger than 123456789. It must, therefore have 1 digit or 9 digits (or more). A remainder of 1 makes no difference to the number of digits. In any case, there can be no number of 4 digits that is divisible by 123456789.