2² × 3² × 19 × 937

Prime Factor Structure

Factorization String 2^2 × 3^2 × 19 × 937

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 36

Divisor Sum (σ) 1,707,160

Proper Divisor Sum 1,066,252

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #640907 ← → #640919

1 2 3 4 6 9 12 18 19 36 38 57 76 114 171 228 342 684 937 1,874 2,811 3,748 5,622 8,433 11,244 16,866 17,803 33,732 35,606 53,409 71,212 106,818 160,227 213,636 320,454 640,908

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

640,908 320,454 160,227 480,682 240,341 721,024 360,512 180,256 90,128 45,064 22,532 11,266 5,633 16,900 8,450 4,225 12,676 6,338 3,169 9,508 4,754 2,377 7,132 3,566 1,783 5,350 2,675 8,026 4,013 12,040 6,020 3,010 1,505 4,516 2,258 1,129 3,388 1,694 847 2,542 1,271 3,814 1,907 5,722 2,861 8,584 4,292 2,146 1,073 3,220 1,610 805 2,416 1,208 604 302 151 454 227 682

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