5 × 79 × 1621

Prime Factor Structure

Factorization String 5 × 79 × 1621

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 778,560

Proper Divisor Sum 138,265

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #640279 ← → #640303

1 5 79 395 1,621 8,105 128,059 640,295

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

640,295 1,920,886 960,443 2,881,330 1,440,665 4,321,996 2,160,998 1,080,499 3,241,498 1,620,749 4,862,248 2,431,124 1,215,562 607,781 1,823,344 911,672 455,836 227,918 113,959 341,878 170,939 512,818 256,409 769,228 384,614 192,307 576,922 288,461 865,384 432,692 216,346 108,173 324,520 162,260 81,130 40,565 121,696 60,848 30,424 15,212 7,606 3,803 11,410 5,705 17,116 8,558 4,279 12,838 6,419 19,258 9,629 28,888 14,444 7,222 3,611 10,834 5,417 16,252 8,126 4,063

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