λ
Sequence Observatory

1,990,792

23 × 29 × 8581
Deficient Even Composite

Starting at 1,990,792, the Collatz iteration reaches 1 after 91 steps. The first transition is 995396; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2^3 × 29 × 8581
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 3,861,900
Proper Divisor Sum 1,871,108
Digit Sum / Digital Root 37 (Root: 1)
Adjacent Primes #1990787 ← → #1990823

Radix Representation

Decimal 1990792
Binary 111100110000010001000 (21 bits)
Octal 0o7460210
Hexadecimal 0x1E6088

Divisor Catalog (16)

1 2 4 8 29 58 116 232 8,581 17,162 34,324 68,648 248,849 497,698 995,396 1,990,792

Collatz Trajectory (91 steps to reach 1)

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

1,990,792 995,396 497,698 248,849 746,548 373,274 186,637 559,912 279,956 139,978 69,989 209,968 104,984 52,492 26,246 13,123 39,370 19,685 59,056 29,528 14,764 7,382 3,691 11,074 5,537 16,612 8,306 4,153 12,460 6,230 3,115 9,346 4,673 14,020 7,010 3,505 10,516 5,258 2,629 7,888 3,944 1,972 986 493 1,480 740 370 185 556 278 139 418 209 628 314 157 472 236 118 59

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