2² × 19 × 8429

Prime Factor Structure

Factorization String 2^2 × 19 × 8429

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,180,200

Proper Divisor Sum 539,596

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #640589 ← → #640613

1 2 4 19 38 76 8,429 16,858 33,716 160,151 320,302 640,604

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

640,604 320,302 160,151 480,454 240,227 720,682 360,341 1,081,024 540,512 270,256 135,128 67,564 33,782 16,891 50,674 25,337 76,012 38,006 19,003 57,010 28,505 85,516 42,758 21,379 64,138 32,069 96,208 48,104 24,052 12,026 6,013 18,040 9,020 4,510 2,255 6,766 3,383 10,150 5,075 15,226 7,613 22,840 11,420 5,710 2,855 8,566 4,283 12,850 6,425 19,276 9,638 4,819 14,458 7,229 21,688 10,844 5,422 2,711 8,134 4,067

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