2² × 5² × 13 × 17 × 29

Prime Factor Structure

Factorization String 2^2 × 5^2 × 13 × 17 × 29

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 72

Divisor Sum (σ) 1,640,520

Proper Divisor Sum 999,620

Digit Sum / Digital Root 19 (Root: 1)

Adjacent Primes #640891 ← → #640901

1 2 4 5 10 13 17 20 25 26 29 34 50 52 58 65 68 85 100 116 130 145 170 221 260 290 325 340 377 425 442 493 580 650 725 754 850 884 986 1,105 1,300 1,450 1,508 1,700 1,885 1,972 2,210 2,465 2,900 3,770 4,420 4,930 5,525 6,409 7,540 9,425 9,860 11,050 12,325 12,818

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

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