685,358

2 × 342679

Starting at 685,358, the Collatz iteration reaches 1 after 53 steps. The first transition is 342679; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 342679

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,028,040

Proper Divisor Sum 342,682

Digit Sum / Digital Root 35 (Root: 8)

Adjacent Primes #685339 ← → #685361

Radix Representation

Decimal	685358
Binary	10100111010100101110 (20 bits)
Octal	0o2472456
Hexadecimal	0xA752E

Divisor Catalog (4)

1 2 342,679 685,358

Collatz Trajectory (53 steps to reach 1)

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

685,358 342,679 1,028,038 514,019 1,542,058 771,029 2,313,088 1,156,544 578,272 289,136 144,568 72,284 36,142 18,071 54,214 27,107 81,322 40,661 121,984 60,992 30,496 15,248 7,624 3,812 1,906 953 2,860 1,430 715 2,146 1,073 3,220 1,610 805 2,416 1,208 604 302 151 454 227 682 341 1,024 512 256 128 64 32 16 8 4 2 1

← Previous Integer #685,357 Browse Full Index Next Integer #685,359 →