λ
Sigma Notebook

647,890

2 × 5 × 67 × 967
Deficient Even Composite

647,890 is even and not a perfect square. Its factorization is 2 × 5 × 67 × 967 and its 16 divisors sum to 1,184,832.

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Prime Factor Structure

Factorization String 2 × 5 × 67 × 967
Distinct Prime Factors 4
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 1,184,832
Proper Divisor Sum 536,942
Digit Sum / Digital Root 34 (Root: 7)
Adjacent Primes #647861 ← → #647891

Radix Representation

Decimal 647890
Binary 10011110001011010010 (20 bits)
Octal 0o2361322
Hexadecimal 0x9E2D2

Divisor Catalog (5 of 16)

1 2 5 10 67

Collatz Trajectory (92 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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