λ
Sigma Notebook

1,989,475

52 × 79579
Deficient Odd Composite

1,989,475 is odd and not a perfect square. Its factorization is 5^2 × 79579 and its 6 divisors sum to 2,466,980.

Prime Factor Structure

Factorization String 5^2 × 79579
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 6
Divisor Sum (σ) 2,466,980
Proper Divisor Sum 477,505
Digit Sum / Digital Root 43 (Root: 7)
Adjacent Primes #1989419 ← → #1989479

Radix Representation

Decimal 1989475
Binary 111100101101101100011 (21 bits)
Octal 0o7455543
Hexadecimal 0x1E5B63

Divisor Catalog (6)

1 5 25 79,579 397,895 1,989,475

Collatz Trajectory (65 steps to reach 1)

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

1,989,475 5,968,426 2,984,213 8,952,640 4,476,320 2,238,160 1,119,080 559,540 279,770 139,885 419,656 209,828 104,914 52,457 157,372 78,686 39,343 118,030 59,015 177,046 88,523 265,570 132,785 398,356 199,178 99,589 298,768 149,384 74,692 37,346 18,673 56,020 28,010 14,005 42,016 21,008 10,504 5,252 2,626 1,313 3,940 1,970 985 2,956 1,478 739 2,218 1,109 3,328 1,664 832 416 208 104 52 26 13 40 20 10

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