840,402
2 × 33 × 79 × 197
Abundant
Even
Composite
Starting at 840,402, the Collatz iteration reaches 1 after 56 steps. The first transition is 420201; the starting value is even with 32 positive divisors.
Resources
Prime Factor Structure
Factorization String
2 × 3^3 × 79 × 197
Distinct Prime Factors
4
Square Status
No
Abundance Measure
Abundant
Analytical Properties
Total Divisors
32
Divisor Sum (σ)
1,900,800
Proper Divisor Sum
1,060,398
Digit Sum / Digital Root
18 (Root: 9)
Adjacent Primes
#840353 ← → #840439
Radix Representation
| Decimal | 840402 |
| Binary | 11001101001011010010 (20 bits) |
| Octal | 0o3151322 |
| Hexadecimal | 0xCD2D2 |
Divisor Catalog (5 of 32)
Collatz Trajectory (56 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.