λ
Sequence Observatory

8,218,929

3 × 2739643
Deficient Odd Composite

Starting at 8,218,929, the Collatz iteration reaches 1 after 54 steps. The first transition is 24656788; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 3 × 2739643
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 10,958,576
Proper Divisor Sum 2,739,647
Digit Sum / Digital Root 39 (Root: 3)
Adjacent Primes #8218913 ← → #8218961

Radix Representation

Decimal 8218929
Binary 11111010110100100110001 (23 bits)
Octal 0o37264461
Hexadecimal 0x7D6931

Divisor Catalog (4)

1 3 2,739,643 8,218,929

Collatz Trajectory (54 steps to reach 1)

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

8,218,929 24,656,788 12,328,394 6,164,197 18,492,592 9,246,296 4,623,148 2,311,574 1,155,787 3,467,362 1,733,681 5,201,044 2,600,522 1,300,261 3,900,784 1,950,392 975,196 487,598 243,799 731,398 365,699 1,097,098 548,549 1,645,648 822,824 411,412 205,706 102,853 308,560 154,280 77,140 38,570 19,285 57,856 28,928 14,464 7,232 3,616 1,808 904 452 226 113 340 170 85 256 128 64 32 16 8 4 2 1

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