3² × 19 × 53 × 181

Prime Factor Structure

Factorization String 3^2 × 19 × 53 × 181

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 2,555,280

Proper Divisor Sum 914,877

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #1640399 ← → #1640423

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

1,640,403 4,921,210 2,460,605 7,381,816 3,690,908 1,845,454 922,727 2,768,182 1,384,091 4,152,274 2,076,137 6,228,412 3,114,206 1,557,103 4,671,310 2,335,655 7,006,966 3,503,483 10,510,450 5,255,225 15,765,676 7,882,838 3,941,419 11,824,258 5,912,129 17,736,388 8,868,194 4,434,097 13,302,292 6,651,146 3,325,573 9,976,720 4,988,360 2,494,180 1,247,090 623,545 1,870,636 935,318 467,659 1,402,978 701,489 2,104,468 1,052,234 526,117 1,578,352 789,176 394,588 197,294 98,647 295,942 147,971 443,914 221,957 665,872 332,936 166,468 83,234 41,617 124,852 62,426

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