λ
Sequence Observatory

1,897,388

22 × 474347
Deficient Even Composite

Starting at 1,897,388, the Collatz iteration reaches 1 after 127 steps. The first transition is 948694; the starting value is even with 6 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 474347
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 6
Divisor Sum (σ) 3,320,436
Proper Divisor Sum 1,423,048
Digit Sum / Digital Root 44 (Root: 8)
Adjacent Primes #1897367 ← → #1897403

Radix Representation

Decimal 1897388
Binary 111001111001110101100 (21 bits)
Octal 0o7171654
Hexadecimal 0x1CF3AC

Divisor Catalog (6)

1 2 4 474,347 948,694 1,897,388

Collatz Trajectory (127 steps to reach 1)

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

1,897,388 948,694 474,347 1,423,042 711,521 2,134,564 1,067,282 533,641 1,600,924 800,462 400,231 1,200,694 600,347 1,801,042 900,521 2,701,564 1,350,782 675,391 2,026,174 1,013,087 3,039,262 1,519,631 4,558,894 2,279,447 6,838,342 3,419,171 10,257,514 5,128,757 15,386,272 7,693,136 3,846,568 1,923,284 961,642 480,821 1,442,464 721,232 360,616 180,308 90,154 45,077 135,232 67,616 33,808 16,904 8,452 4,226 2,113 6,340 3,170 1,585 4,756 2,378 1,189 3,568 1,784 892 446 223 670 335

More profiles

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