1,728,789

3 × 173 × 3331

1,728,789 has digital root 6. The neighboring primes are 1728773 and 1728809; its proper-divisor sum differs from the starting integer by -1,138,506.

Prime Factor Structure

Factorization String 3 × 173 × 3331

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 8

Divisor Sum (σ) 2,319,072

Proper Divisor Sum 590,283

Digit Sum / Digital Root 42 (Root: 6)

Adjacent Primes #1728773 ← → #1728809

1 3 173 519 3,331 9,993 576,263 1,728,789

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

1,728,789 5,186,368 2,593,184 1,296,592 648,296 324,148 162,074 81,037 243,112 121,556 60,778 30,389 91,168 45,584 22,792 11,396 5,698 2,849 8,548 4,274 2,137 6,412 3,206 1,603 4,810 2,405 7,216 3,608 1,804 902 451 1,354 677 2,032 1,016 508 254 127 382 191 574 287 862 431 1,294 647 1,942 971 2,914 1,457 4,372 2,186 1,093 3,280 1,640 820 410 205 616 308

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