λ
Sequence Observatory

4,389,280

25 × 5 × 7 × 3919
Abundant Even Composite

Starting at 4,389,280, the Collatz iteration reaches 1 after 180 steps. The first transition is 2194640; the starting value is even with 48 positive divisors.

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Prime Factor Structure

Factorization String 2^5 × 5 × 7 × 3919
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 48
Divisor Sum (σ) 11,854,080
Proper Divisor Sum 7,464,800
Digit Sum / Digital Root 34 (Root: 7)
Adjacent Primes #4389269 ← → #4389293

Radix Representation

Decimal 4389280
Binary 10000101111100110100000 (23 bits)
Octal 0o20574640
Hexadecimal 0x42F9A0

Divisor Catalog (5 of 48)

1 2 4 5 7

Collatz Trajectory (180 steps to reach 1)

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

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

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