2² × 5² × 3989

Prime Factor Structure

Factorization String 2^2 × 5^2 × 3989

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 865,830

Proper Divisor Sum 466,930

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #398887 ← → #398903

1 2 4 5 10 20 25 50 100 3,989 7,978 15,956 19,945 39,890 79,780 99,725 199,450 398,900

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

398,900 199,450 99,725 299,176 149,588 74,794 37,397 112,192 56,096 28,048 14,024 7,012 3,506 1,753 5,260 2,630 1,315 3,946 1,973 5,920 2,960 1,480 740 370 185 556 278 139 418 209 628 314 157 472 236 118 59 178 89 268 134 67 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13

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