2³ × 7² × 23 × 71

Prime Factor Structure

Factorization String 2^3 × 7^2 × 23 × 71

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 48

Divisor Sum (σ) 1,477,440

Proper Divisor Sum 837,304

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #640127 ← → #640139

1 2 4 7 8 14 23 28 46 49 56 71 92 98 142 161 184 196 284 322 392 497 568 644 994 1,127 1,288 1,633 1,988 2,254 3,266 3,479 3,976 4,508 6,532 6,958 9,016 11,431 13,064 13,916 22,862 27,832 45,724 80,017 91,448 160,034 320,068 640,136

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

640,136 320,068 160,034 80,017 240,052 120,026 60,013 180,040 90,020 45,010 22,505 67,516 33,758 16,879 50,638 25,319 75,958 37,979 113,938 56,969 170,908 85,454 42,727 128,182 64,091 192,274 96,137 288,412 144,206 72,103 216,310 108,155 324,466 162,233 486,700 243,350 121,675 365,026 182,513 547,540 273,770 136,885 410,656 205,328 102,664 51,332 25,666 12,833 38,500 19,250 9,625 28,876 14,438 7,219 21,658 10,829 32,488 16,244 8,122 4,061

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