400,820

2² × 5 × 7² × 409

Prime Factor Structure

Factorization String 2^2 × 5 × 7^2 × 409

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Total Divisors 36

Divisor Sum (σ) 981,540

Proper Divisor Sum 580,720

Digit Sum / Digital Root 14 (Root: 5)

Adjacent Primes #400759 ← → #400823

1 2 4 5 7 10 14 20 28 35 49 70 98 140 196 245 409 490 818 980 1,636 2,045 2,863 4,090 5,726 8,180 11,452 14,315 20,041 28,630 40,082 57,260 80,164 100,205 200,410 400,820

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

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