2 × 3² × 5 × 7 × 643

Prime Factor Structure

Factorization String 2 × 3^2 × 5 × 7 × 643

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 48

Divisor Sum (σ) 1,205,568

Proper Divisor Sum 800,478

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #405089 ← → #405091

1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 63 70 90 105 126 210 315 630 643 1,286 1,929 3,215 3,858 4,501 5,787 6,430 9,002 9,645 11,574 13,503 19,290 22,505 27,006 28,935 40,509 45,010 57,870 67,515 81,018 135,030 202,545 405,090

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

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