621,639
32 × 172 × 239
Deficient
Odd
Composite
621,639 factors as 3^2 × 17^2 × 239. Its 18 positive divisors give a proper-divisor sum of 336,201, so this integer is deficient. The Collatz stopping time is 66 steps.
Resources
Prime Factor Structure
Factorization String
3^2 × 17^2 × 239
Distinct Prime Factors
3
Square Status
No
Abundance Measure
Deficient
Analytical Properties
Total Divisors
18
Divisor Sum (σ)
957,840
Proper Divisor Sum
336,201
Digit Sum / Digital Root
27 (Root: 9)
Adjacent Primes
#621631 ← → #621641
Radix Representation
| Decimal | 621639 |
| Binary | 10010111110001000111 (20 bits) |
| Octal | 0o2276107 |
| Hexadecimal | 0x97C47 |
Divisor Catalog (5 of 18)
Collatz Trajectory (66 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.