2 × 5³ × 13 × 197

Prime Factor Structure

Factorization String 2 × 5^3 × 13 × 197

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 32

Divisor Sum (σ) 1,297,296

Proper Divisor Sum 657,046

Digit Sum / Digital Root 17 (Root: 8)

Adjacent Primes #640249 ← → #640259

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

640,250 320,125 960,376 480,188 240,094 120,047 360,142 180,071 540,214 270,107 810,322 405,161 1,215,484 607,742 303,871 911,614 455,807 1,367,422 683,711 2,051,134 1,025,567 3,076,702 1,538,351 4,615,054 2,307,527 6,922,582 3,461,291 10,383,874 5,191,937 15,575,812 7,787,906 3,893,953 11,681,860 5,840,930 2,920,465 8,761,396 4,380,698 2,190,349 6,571,048 3,285,524 1,642,762 821,381 2,464,144 1,232,072 616,036 308,018 154,009 462,028 231,014 115,507 346,522 173,261 519,784 259,892 129,946 64,973 194,920 97,460 48,730 24,365

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