3,988,139

251 × 15889

Starting at 3,988,139, the Collatz iteration reaches 1 after 123 steps. The first transition is 11964418; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 251 × 15889

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 4,004,280

Proper Divisor Sum 16,141

Digit Sum / Digital Root 41 (Root: 5)

Adjacent Primes #3988129 ← → #3988147

Radix Representation

Decimal	3988139
Binary	1111001101101010101011 (22 bits)
Octal	0o17155253
Hexadecimal	0x3CDAAB

Divisor Catalog (4)

1 251 15,889 3,988,139

Collatz Trajectory (123 steps to reach 1)

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

3,988,139 11,964,418 5,982,209 17,946,628 8,973,314 4,486,657 13,459,972 6,729,986 3,364,993 10,094,980 5,047,490 2,523,745 7,571,236 3,785,618 1,892,809 5,678,428 2,839,214 1,419,607 4,258,822 2,129,411 6,388,234 3,194,117 9,582,352 4,791,176 2,395,588 1,197,794 598,897 1,796,692 898,346 449,173 1,347,520 673,760 336,880 168,440 84,220 42,110 21,055 63,166 31,583 94,750 47,375 142,126 71,063 213,190 106,595 319,786 159,893 479,680 239,840 119,920 59,960 29,980 14,990 7,495 22,486 11,243 33,730 16,865 50,596 25,298

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