990,395

5 × 7 × 28297

Starting at 990,395, the Collatz iteration reaches 1 after 121 steps. The first transition is 2971186; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 5 × 7 × 28297

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 1,358,304

Proper Divisor Sum 367,909

Digit Sum / Digital Root 35 (Root: 8)

Adjacent Primes #990389 ← → #990397

Radix Representation

Decimal	990395
Binary	11110001110010111011 (20 bits)
Octal	0o3616273
Hexadecimal	0xF1CBB

Divisor Catalog (8)

1 5 7 35 28,297 141,485 198,079 990,395

Collatz Trajectory (121 steps to reach 1)

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

990,395 2,971,186 1,485,593 4,456,780 2,228,390 1,114,195 3,342,586 1,671,293 5,013,880 2,506,940 1,253,470 626,735 1,880,206 940,103 2,820,310 1,410,155 4,230,466 2,115,233 6,345,700 3,172,850 1,586,425 4,759,276 2,379,638 1,189,819 3,569,458 1,784,729 5,354,188 2,677,094 1,338,547 4,015,642 2,007,821 6,023,464 3,011,732 1,505,866 752,933 2,258,800 1,129,400 564,700 282,350 141,175 423,526 211,763 635,290 317,645 952,936 476,468 238,234 119,117 357,352 178,676 89,338 44,669 134,008 67,004 33,502 16,751 50,254 25,127 75,382 37,691

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