3² × 5 × 23 × 619

Prime Factor Structure

Factorization String 3^2 × 5 × 23 × 619

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 1,160,640

Proper Divisor Sum 519,975

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #640663 ← → #640667

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

640,665 1,921,996 960,998 480,499 1,441,498 720,749 2,162,248 1,081,124 540,562 270,281 810,844 405,422 202,711 608,134 304,067 912,202 456,101 1,368,304 684,152 342,076 171,038 85,519 256,558 128,279 384,838 192,419 577,258 288,629 865,888 432,944 216,472 108,236 54,118 27,059 81,178 40,589 121,768 60,884 30,442 15,221 45,664 22,832 11,416 5,708 2,854 1,427 4,282 2,141 6,424 3,212 1,606 803 2,410 1,205 3,616 1,808 904 452 226 113

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