3,994,420

2² × 5 × 199721

3,994,420 has digital root 4. The neighboring primes are 3994411 and 3994421; its proper-divisor sum differs from the starting integer by 399,484.

Prime Factor Structure

Factorization String 2^2 × 5 × 199721

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 8,388,324

Proper Divisor Sum 4,393,904

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #3994411 ← → #3994421

Radix Representation

Decimal	3994420
Binary	1111001111001100110100 (22 bits)
Octal	0o17171464
Hexadecimal	0x3CF334

Divisor Catalog (12)

1 2 4 5 10 20 199,721 399,442 798,884 998,605 1,997,210 3,994,420

Collatz Trajectory (154 steps to reach 1)

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

3,994,420 1,997,210 998,605 2,995,816 1,497,908 748,954 374,477 1,123,432 561,716 280,858 140,429 421,288 210,644 105,322 52,661 157,984 78,992 39,496 19,748 9,874 4,937 14,812 7,406 3,703 11,110 5,555 16,666 8,333 25,000 12,500 6,250 3,125 9,376 4,688 2,344 1,172 586 293 880 440 220 110 55 166 83 250 125 376 188 94 47 142 71 214 107 322 161 484 242 121

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