2² × 19 × 8423

Prime Factor Structure

Factorization String 2^2 × 19 × 8423

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 1,179,360

Proper Divisor Sum 539,212

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #640139 ← → #640151

1 2 4 19 38 76 8,423 16,846 33,692 160,037 320,074 640,148

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

640,148 320,074 160,037 480,112 240,056 120,028 60,014 30,007 90,022 45,011 135,034 67,517 202,552 101,276 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.