8,378,647

23 × 364289

Starting at 8,378,647, the Collatz iteration reaches 1 after 168 steps. The first transition is 25135942; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 23 × 364289

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 8,742,960

Proper Divisor Sum 364,313

Digit Sum / Digital Root 43 (Root: 7)

Adjacent Primes #8378641 ← → #8378653

Radix Representation

Decimal	8378647
Binary	11111111101100100010111 (23 bits)
Octal	0o37754427
Hexadecimal	0x7FD917

Divisor Catalog (4)

1 23 364,289 8,378,647

Collatz Trajectory (168 steps to reach 1)

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

8,378,647 25,135,942 12,567,971 37,703,914 18,851,957 56,555,872 28,277,936 14,138,968 7,069,484 3,534,742 1,767,371 5,302,114 2,651,057 7,953,172 3,976,586 1,988,293 5,964,880 2,982,440 1,491,220 745,610 372,805 1,118,416 559,208 279,604 139,802 69,901 209,704 104,852 52,426 26,213 78,640 39,320 19,660 9,830 4,915 14,746 7,373 22,120 11,060 5,530 2,765 8,296 4,148 2,074 1,037 3,112 1,556 778 389 1,168 584 292 146 73 220 110 55 166 83 250

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