A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3610464 can be evenly divided by 1 2 3 4 6 8 11 12 13 16 22 24 26 32 33 39 44 48 52 66 78 88 96 104 132 143 156 176 208 263 264 286 312 352 416 429 526 528 572 624 789 858 1,052 1,056 1,144 1,248 1,578 1,716 2,104 2,288 2,893 3,156 3,419 3,432 4,208 4,576 5,786 6,312 6,838 6,864 8,416 8,679 10,257 11,572 12,624 13,676 13,728 17,358 20,514 23,144 25,248 27,352 34,716 37,609 41,028 46,288 54,704 69,432 75,218 82,056 92,576 109,408 112,827 138,864 150,436 164,112 225,654 277,728 300,872 328,224 451,308 601,744 902,616 1,203,488 1,805,232 and 3,610,464, with no remainder.
Since 3,610,464 cannot be divided by just 1 and 3,610,464, it is not a prime number.