28,697,487

3 × 7² × 13 × 15017

28,697,487 factors as 3 × 7^2 × 13 × 15017. Its 24 positive divisors give a proper-divisor sum of 19,239,969, so this integer is deficient. The Collatz stopping time is 100 steps.

Prime Factor Structure

Factorization String 3 × 7^2 × 13 × 15017

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 47,937,456

Proper Divisor Sum 19,239,969

Digit Sum / Digital Root 51 (Root: 6)

Adjacent Primes #28697441 ← → #28697489

Radix Representation

Decimal	28697487
Binary	1101101011110001110001111 (25 bits)
Octal	0o155361617
Hexadecimal	0x1B5E38F

Divisor Catalog (24)

Collatz Trajectory (100 steps to reach 1)

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

28,697,487 86,092,462 43,046,231 129,138,694 64,569,347 193,708,042 96,854,021 290,562,064 145,281,032 72,640,516 36,320,258 18,160,129 54,480,388 27,240,194 13,620,097 40,860,292 20,430,146 10,215,073 30,645,220 15,322,610 7,661,305 22,983,916 11,491,958 5,745,979 17,237,938 8,618,969 25,856,908 12,928,454 6,464,227 19,392,682 9,696,341 29,089,024 14,544,512 7,272,256 3,636,128 1,818,064 909,032 454,516 227,258 113,629 340,888 170,444 85,222 42,611 127,834 63,917 191,752 95,876 47,938 23,969 71,908 35,954 17,977 53,932 26,966 13,483 40,450 20,225 60,676 30,338

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