8,721,184

2⁵ × 272537

8,721,184 has digital root 4. The neighboring primes are 8721157 and 8721191; its proper-divisor sum differs from the starting integer by -272,474.

Prime Factor Structure

Factorization String 2^5 × 272537

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 17,169,894

Proper Divisor Sum 8,448,710

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #8721157 ← → #8721191

1 2 4 8 16 32 272,537 545,074 1,090,148 2,180,296 4,360,592 8,721,184

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

8,721,184 4,360,592 2,180,296 1,090,148 545,074 272,537 817,612 408,806 204,403 613,210 306,605 919,816 459,908 229,954 114,977 344,932 172,466 86,233 258,700 129,350 64,675 194,026 97,013 291,040 145,520 72,760 36,380 18,190 9,095 27,286 13,643 40,930 20,465 61,396 30,698 15,349 46,048 23,024 11,512 5,756 2,878 1,439 4,318 2,159 6,478 3,239 9,718 4,859 14,578 7,289 21,868 10,934 5,467 16,402 8,201 24,604 12,302 6,151 18,454 9,227

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