2² × 5² × 41 × 157

Prime Factor Structure

Factorization String 2^2 × 5^2 × 41 × 157

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 36

Divisor Sum (σ) 1,440,012

Proper Divisor Sum 796,312

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #643697 ← → #643703

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

643,700 321,850 160,925 482,776 241,388 120,694 60,347 181,042 90,521 271,564 135,782 67,891 203,674 101,837 305,512 152,756 76,378 38,189 114,568 57,284 28,642 14,321 42,964 21,482 10,741 32,224 16,112 8,056 4,028 2,014 1,007 3,022 1,511 4,534 2,267 6,802 3,401 10,204 5,102 2,551 7,654 3,827 11,482 5,741 17,224 8,612 4,306 2,153 6,460 3,230 1,615 4,846 2,423 7,270 3,635 10,906 5,453 16,360 8,180 4,090

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.