3,999,980

2² × 5 × 199999

Prime Factor Structure

Factorization String 2^2 × 5 × 199999

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 12

Divisor Sum (σ) 8,400,000

Proper Divisor Sum 4,400,020

Digit Sum / Digital Root 47 (Root: 2)

Adjacent Primes #3999971 ← → #4000037

1 2 4 5 10 20 199,999 399,998 799,996 999,995 1,999,990 3,999,980

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

3,999,980 1,999,990 999,995 2,999,986 1,499,993 4,499,980 2,249,990 1,124,995 3,374,986 1,687,493 5,062,480 2,531,240 1,265,620 632,810 316,405 949,216 474,608 237,304 118,652 59,326 29,663 88,990 44,495 133,486 66,743 200,230 100,115 300,346 150,173 450,520 225,260 112,630 56,315 168,946 84,473 253,420 126,710 63,355 190,066 95,033 285,100 142,550 71,275 213,826 106,913 320,740 160,370 80,185 240,556 120,278 60,139 180,418 90,209 270,628 135,314 67,657 202,972 101,486 50,743 152,230

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