28,980,625

5⁴ × 89 × 521

28,980,625 factors as 5^4 × 89 × 521. Its 20 positive divisors give a proper-divisor sum of 7,710,755, so this integer is deficient. The Collatz stopping time is 144 steps.

Prime Factor Structure

Factorization String 5^4 × 89 × 521

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 20

Divisor Sum (σ) 36,691,380

Proper Divisor Sum 7,710,755

Digit Sum / Digital Root 40 (Root: 4)

Adjacent Primes #28980613 ← → #28980641

Radix Representation

Decimal	28980625
Binary	1101110100011010110010001 (25 bits)
Octal	0o156432621
Hexadecimal	0x1BA3591

Divisor Catalog (20)

Collatz Trajectory (144 steps to reach 1)

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

28,980,625 86,941,876 43,470,938 21,735,469 65,206,408 32,603,204 16,301,602 8,150,801 24,452,404 12,226,202 6,113,101 18,339,304 9,169,652 4,584,826 2,292,413 6,877,240 3,438,620 1,719,310 859,655 2,578,966 1,289,483 3,868,450 1,934,225 5,802,676 2,901,338 1,450,669 4,352,008 2,176,004 1,088,002 544,001 1,632,004 816,002 408,001 1,224,004 612,002 306,001 918,004 459,002 229,501 688,504 344,252 172,126 86,063 258,190 129,095 387,286 193,643 580,930 290,465 871,396 435,698 217,849 653,548 326,774 163,387 490,162 245,081 735,244 367,622 183,811

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