λ
Sequence Observatory

7,479,578

2 × 19 × 196831
Deficient Even Composite

Starting at 7,479,578, the Collatz iteration reaches 1 after 173 steps. The first transition is 3739789; the starting value is even with 8 positive divisors.

Prime Factor Structure

Factorization String 2 × 19 × 196831
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 11,809,920
Proper Divisor Sum 4,330,342
Digit Sum / Digital Root 47 (Root: 2)
Adjacent Primes #7479557 ← → #7479599

Radix Representation

Decimal 7479578
Binary 11100100010000100011010 (23 bits)
Octal 0o34420432
Hexadecimal 0x72211A

Divisor Catalog (8)

1 2 19 38 196,831 393,662 3,739,789 7,479,578

Collatz Trajectory (173 steps to reach 1)

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

7,479,578 3,739,789 11,219,368 5,609,684 2,804,842 1,402,421 4,207,264 2,103,632 1,051,816 525,908 262,954 131,477 394,432 197,216 98,608 49,304 24,652 12,326 6,163 18,490 9,245 27,736 13,868 6,934 3,467 10,402 5,201 15,604 7,802 3,901 11,704 5,852 2,926 1,463 4,390 2,195 6,586 3,293 9,880 4,940 2,470 1,235 3,706 1,853 5,560 2,780 1,390 695 2,086 1,043 3,130 1,565 4,696 2,348 1,174 587 1,762 881 2,644 1,322

More profiles

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