816,806

2 × 408403

Starting at 816,806, the Collatz iteration reaches 1 after 175 steps. The first transition is 408403; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 408403

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,225,212

Proper Divisor Sum 408,406

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #816779 ← → #816811

Radix Representation

Decimal	816806
Binary	11000111011010100110 (20 bits)
Octal	0o3073246
Hexadecimal	0xC76A6

Divisor Catalog (4)

1 2 408,403 816,806

Collatz Trajectory (175 steps to reach 1)

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

816,806 408,403 1,225,210 612,605 1,837,816 918,908 459,454 229,727 689,182 344,591 1,033,774 516,887 1,550,662 775,331 2,325,994 1,162,997 3,488,992 1,744,496 872,248 436,124 218,062 109,031 327,094 163,547 490,642 245,321 735,964 367,982 183,991 551,974 275,987 827,962 413,981 1,241,944 620,972 310,486 155,243 465,730 232,865 698,596 349,298 174,649 523,948 261,974 130,987 392,962 196,481 589,444 294,722 147,361 442,084 221,042 110,521 331,564 165,782 82,891 248,674 124,337 373,012 186,506

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