398,800

2⁴ × 5² × 997

Prime Factor Structure

Factorization String 2^4 × 5^2 × 997

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 30

Divisor Sum (σ) 959,078

Proper Divisor Sum 560,278

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #398771 ← → #398813

1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 997 1,994 3,988 4,985 7,976 9,970 15,952 19,940 24,925 39,880 49,850 79,760 99,700 199,400 398,800

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

398,800 199,400 99,700 49,850 24,925 74,776 37,388 18,694 9,347 28,042 14,021 42,064 21,032 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 59 178 89 268 134 67 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13

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