λ
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Atlas › Integer Profiles › Node 28,488,020

28,488,020

22 × 5 × 11 × 129491
Abundant Even Composite

28,488,020 factors as 2^2 × 5 × 11 × 129491. Its 24 positive divisors give a proper-divisor sum of 36,775,948, so this integer is abundant. The Collatz stopping time is 162 steps.

Prime Factor Structure

Factorization String 2^2 × 5 × 11 × 129491
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 24
Divisor Sum (σ) 65,263,968
Proper Divisor Sum 36,775,948
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #28488017 ← → #28488023

Radix Representation

Decimal 28488020
Binary 1101100101011000101010100 (25 bits)
Octal 0o154530524
Hexadecimal 0x1B2B154

Divisor Catalog (24)

1 2 4 5 10 11 20 22 44 55 110 220 129,491 258,982 517,964 647,455 1,294,910 1,424,401 2,589,820 2,848,802 5,697,604 7,122,005 14,244,010 28,488,020

Collatz Trajectory (162 steps to reach 1)

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

28,488,020 14,244,010 7,122,005 21,366,016 10,683,008 5,341,504 2,670,752 1,335,376 667,688 333,844 166,922 83,461 250,384 125,192 62,596 31,298 15,649 46,948 23,474 11,737 35,212 17,606 8,803 26,410 13,205 39,616 19,808 9,904 4,952 2,476 1,238 619 1,858 929 2,788 1,394 697 2,092 1,046 523 1,570 785 2,356 1,178 589 1,768 884 442 221 664 332 166 83 250 125 376 188 94 47 142

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