1,998,215

5 × 399643

1,998,215 factors as 5 × 399643. Its 4 positive divisors give a proper-divisor sum of 399,649, so this integer is deficient. The Collatz stopping time is 114 steps.

Prime Factor Structure

Factorization String 5 × 399643

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,397,864

Proper Divisor Sum 399,649

Digit Sum / Digital Root 35 (Root: 8)

Adjacent Primes #1998209 ← → #1998221

Radix Representation

Decimal	1998215
Binary	111100111110110000111 (21 bits)
Octal	0o7476607
Hexadecimal	0x1E7D87

Divisor Catalog (4)

1 5 399,643 1,998,215

Collatz Trajectory (114 steps to reach 1)

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

1,998,215 5,994,646 2,997,323 8,991,970 4,495,985 13,487,956 6,743,978 3,371,989 10,115,968 5,057,984 2,528,992 1,264,496 632,248 316,124 158,062 79,031 237,094 118,547 355,642 177,821 533,464 266,732 133,366 66,683 200,050 100,025 300,076 150,038 75,019 225,058 112,529 337,588 168,794 84,397 253,192 126,596 63,298 31,649 94,948 47,474 23,737 71,212 35,606 17,803 53,410 26,705 80,116 40,058 20,029 60,088 30,044 15,022 7,511 22,534 11,267 33,802 16,901 50,704 25,352 12,676

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