646,391

17 × 47 × 809

646,391 factors as 17 × 47 × 809. Its 8 positive divisors give a proper-divisor sum of 53,449, so this integer is deficient. The Collatz stopping time is 92 steps.

Prime Factor Structure

Factorization String 17 × 47 × 809

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 699,840

Proper Divisor Sum 53,449

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #646379 ← → #646397

Radix Representation

Decimal	646391
Binary	10011101110011110111 (20 bits)
Octal	0o2356367
Hexadecimal	0x9DCF7

Divisor Catalog (8)

1 17 47 799 809 13,753 38,023 646,391

Collatz Trajectory (92 steps to reach 1)

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

646,391 1,939,174 969,587 2,908,762 1,454,381 4,363,144 2,181,572 1,090,786 545,393 1,636,180 818,090 409,045 1,227,136 613,568 306,784 153,392 76,696 38,348 19,174 9,587 28,762 14,381 43,144 21,572 10,786 5,393 16,180 8,090 4,045 12,136 6,068 3,034 1,517 4,552 2,276 1,138 569 1,708 854 427 1,282 641 1,924 962 481 1,444 722 361 1,084 542 271 814 407 1,222 611 1,834 917 2,752 1,376 688

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