2² × 13 × 31 × 397

Prime Factor Structure

Factorization String 2^2 × 13 × 31 × 397

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 1,248,128

Proper Divisor Sum 608,164

Digit Sum / Digital Root 37 (Root: 1)

Adjacent Primes #639959 ← → #639983

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

639,964 319,982 159,991 479,974 239,987 719,962 359,981 1,079,944 539,972 269,986 134,993 404,980 202,490 101,245 303,736 151,868 75,934 37,967 113,902 56,951 170,854 85,427 256,282 128,141 384,424 192,212 96,106 48,053 144,160 72,080 36,040 18,020 9,010 4,505 13,516 6,758 3,379 10,138 5,069 15,208 7,604 3,802 1,901 5,704 2,852 1,426 713 2,140 1,070 535 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.