628,140

2² × 3 × 5 × 19² × 29

Prime Factor Structure

Factorization String 2^2 × 3 × 5 × 19^2 × 29

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Total Divisors 72

Divisor Sum (σ) 1,920,240

Proper Divisor Sum 1,292,100

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #628139 ← → #628171

1 2 3 4 5 6 10 12 15 19 20 29 30 38 57 58 60 76 87 95 114 116 145 174 190 228 285 290 348 361 380 435 551 570 580 722 870 1,083 1,102 1,140 1,444 1,653 1,740 1,805 2,166 2,204 2,755 3,306 3,610 4,332 5,415 5,510 6,612 7,220 8,265 10,469 10,830 11,020 16,530 20,938

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

628,140 314,070 157,035 471,106 235,553 706,660 353,330 176,665 529,996 264,998 132,499 397,498 198,749 596,248 298,124 149,062 74,531 223,594 111,797 335,392 167,696 83,848 41,924 20,962 10,481 31,444 15,722 7,861 23,584 11,792 5,896 2,948 1,474 737 2,212 1,106 553 1,660 830 415 1,246 623 1,870 935 2,806 1,403 4,210 2,105 6,316 3,158 1,579 4,738 2,369 7,108 3,554 1,777 5,332 2,666 1,333 4,000

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