9,998,840

2³ × 5 × 249971

Starting at 9,998,840, the Collatz iteration reaches 1 after 163 steps. The first transition is 4999420; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2^3 × 5 × 249971

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 22,497,480

Proper Divisor Sum 12,498,640

Digit Sum / Digital Root 47 (Root: 2)

Adjacent Primes #9998809 ← → #9998851

Radix Representation

Decimal	9998840
Binary	100110001001000111111000 (24 bits)
Octal	0o46110770
Hexadecimal	0x9891F8

Divisor Catalog (16)

1 2 4 5 8 10 20 40 249,971 499,942 999,884 1,249,855 1,999,768 2,499,710 4,999,420 9,998,840

Collatz Trajectory (163 steps to reach 1)

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

9,998,840 4,999,420 2,499,710 1,249,855 3,749,566 1,874,783 5,624,350 2,812,175 8,436,526 4,218,263 12,654,790 6,327,395 18,982,186 9,491,093 28,473,280 14,236,640 7,118,320 3,559,160 1,779,580 889,790 444,895 1,334,686 667,343 2,002,030 1,001,015 3,003,046 1,501,523 4,504,570 2,252,285 6,756,856 3,378,428 1,689,214 844,607 2,533,822 1,266,911 3,800,734 1,900,367 5,701,102 2,850,551 8,551,654 4,275,827 12,827,482 6,413,741 19,241,224 9,620,612 4,810,306 2,405,153 7,215,460 3,607,730 1,803,865 5,411,596 2,705,798 1,352,899 4,058,698 2,029,349 6,088,048 3,044,024 1,522,012 761,006 380,503

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