1,998,290

2 × 5 × 7 × 28547

1,998,290 factors as 2 × 5 × 7 × 28547. Its 16 positive divisors give a proper-divisor sum of 2,112,622, so this integer is abundant. The Collatz stopping time is 184 steps.

Prime Factor Structure

Factorization String 2 × 5 × 7 × 28547

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 4,110,912

Proper Divisor Sum 2,112,622

Digit Sum / Digital Root 38 (Root: 2)

Adjacent Primes #1998289 ← → #1998301

Radix Representation

Decimal	1998290
Binary	111100111110111010010 (21 bits)
Octal	0o7476722
Hexadecimal	0x1E7DD2

Divisor Catalog (16)

1 2 5 7 10 14 35 70 28,547 57,094 142,735 199,829 285,470 399,658 999,145 1,998,290

Collatz Trajectory (184 steps to reach 1)

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

1,998,290 999,145 2,997,436 1,498,718 749,359 2,248,078 1,124,039 3,372,118 1,686,059 5,058,178 2,529,089 7,587,268 3,793,634 1,896,817 5,690,452 2,845,226 1,422,613 4,267,840 2,133,920 1,066,960 533,480 266,740 133,370 66,685 200,056 100,028 50,014 25,007 75,022 37,511 112,534 56,267 168,802 84,401 253,204 126,602 63,301 189,904 94,952 47,476 23,738 11,869 35,608 17,804 8,902 4,451 13,354 6,677 20,032 10,016 5,008 2,504 1,252 626 313 940 470 235 706 353

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