λ
Sequence Observatory

2,208,798

2 × 32 × 277 × 443
Abundant Even Composite

Starting at 2,208,798, the Collatz iteration reaches 1 after 148 steps. The first transition is 1104399; the starting value is even with 24 positive divisors.

Prime Factor Structure

Factorization String 2 × 3^2 × 277 × 443
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 24
Divisor Sum (σ) 4,813,848
Proper Divisor Sum 2,605,050
Digit Sum / Digital Root 36 (Root: 9)
Adjacent Primes #2208797 ← → #2208799

Radix Representation

Decimal 2208798
Binary 1000011011010000011110 (22 bits)
Octal 0o10332036
Hexadecimal 0x21B41E

Divisor Catalog (24)

1 2 3 6 9 18 277 443 554 831 886 1,329 1,662 2,493 2,658 3,987 4,986 7,974 122,711 245,422 368,133 736,266 1,104,399 2,208,798

Collatz Trajectory (148 steps to reach 1)

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

2,208,798 1,104,399 3,313,198 1,656,599 4,969,798 2,484,899 7,454,698 3,727,349 11,182,048 5,591,024 2,795,512 1,397,756 698,878 349,439 1,048,318 524,159 1,572,478 786,239 2,358,718 1,179,359 3,538,078 1,769,039 5,307,118 2,653,559 7,960,678 3,980,339 11,941,018 5,970,509 17,911,528 8,955,764 4,477,882 2,238,941 6,716,824 3,358,412 1,679,206 839,603 2,518,810 1,259,405 3,778,216 1,889,108 944,554 472,277 1,416,832 708,416 354,208 177,104 88,552 44,276 22,138 11,069 33,208 16,604 8,302 4,151 12,454 6,227 18,682 9,341 28,024 14,012

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