400,640

2⁸ × 5 × 313

Prime Factor Structure

Factorization String 2^8 × 5 × 313

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 36

Divisor Sum (σ) 962,724

Proper Divisor Sum 562,084

Digit Sum / Digital Root 14 (Root: 5)

Adjacent Primes #400619 ← → #400643

1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 313 320 626 640 1,252 1,280 1,565 2,504 3,130 5,008 6,260 10,016 12,520 20,032 25,040 40,064 50,080 80,128 100,160 200,320 400,640

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

400,640 200,320 100,160 50,080 25,040 12,520 6,260 3,130 1,565 4,696 2,348 1,174 587 1,762 881 2,644 1,322 661 1,984 992 496 248 124 62 31 94 47 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890 445

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