2,891,918

2 × 1445959

Starting at 2,891,918, the Collatz iteration reaches 1 after 120 steps. The first transition is 1445959; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 1445959

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 4,337,880

Proper Divisor Sum 1,445,962

Digit Sum / Digital Root 38 (Root: 2)

Adjacent Primes #2891899 ← → #2891927

Radix Representation

Decimal	2891918
Binary	1011000010000010001110 (22 bits)
Octal	0o13020216
Hexadecimal	0x2C208E

Divisor Catalog (4)

1 2 1,445,959 2,891,918

Collatz Trajectory (120 steps to reach 1)

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

2,891,918 1,445,959 4,337,878 2,168,939 6,506,818 3,253,409 9,760,228 4,880,114 2,440,057 7,320,172 3,660,086 1,830,043 5,490,130 2,745,065 8,235,196 4,117,598 2,058,799 6,176,398 3,088,199 9,264,598 4,632,299 13,896,898 6,948,449 20,845,348 10,422,674 5,211,337 15,634,012 7,817,006 3,908,503 11,725,510 5,862,755 17,588,266 8,794,133 26,382,400 13,191,200 6,595,600 3,297,800 1,648,900 824,450 412,225 1,236,676 618,338 309,169 927,508 463,754 231,877 695,632 347,816 173,908 86,954 43,477 130,432 65,216 32,608 16,304 8,152 4,076 2,038 1,019 3,058

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