684,640

2⁵ × 5 × 11 × 389

Prime Factor Structure

Factorization String 2^5 × 5 × 11 × 389

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Total Divisors 48

Divisor Sum (σ) 1,769,040

Proper Divisor Sum 1,084,400

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #684637 ← → #684643

1 2 4 5 8 10 11 16 20 22 32 40 44 55 80 88 110 160 176 220 352 389 440 778 880 1,556 1,760 1,945 3,112 3,890 4,279 6,224 7,780 8,558 12,448 15,560 17,116 21,395 31,120 34,232 42,790 62,240 68,464 85,580 136,928 171,160 342,320 684,640

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

684,640 342,320 171,160 85,580 42,790 21,395 64,186 32,093 96,280 48,140 24,070 12,035 36,106 18,053 54,160 27,080 13,540 6,770 3,385 10,156 5,078 2,539 7,618 3,809 11,428 5,714 2,857 8,572 4,286 2,143 6,430 3,215 9,646 4,823 14,470 7,235 21,706 10,853 32,560 16,280 8,140 4,070 2,035 6,106 3,053 9,160 4,580 2,290 1,145 3,436 1,718 859 2,578 1,289 3,868 1,934 967 2,902 1,451 4,354

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