1,388,748

2² × 3 × 19 × 6091

1,388,748 has digital root 3. The neighboring primes are 1388743 and 1388773; its proper-divisor sum differs from the starting integer by 634,024.

Prime Factor Structure

Factorization String 2^2 × 3 × 19 × 6091

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Total Divisors 24

Divisor Sum (σ) 3,411,520

Proper Divisor Sum 2,022,772

Digit Sum / Digital Root 39 (Root: 3)

Adjacent Primes #1388743 ← → #1388773

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

1,388,748 694,374 347,187 1,041,562 520,781 1,562,344 781,172 390,586 195,293 585,880 292,940 146,470 73,235 219,706 109,853 329,560 164,780 82,390 41,195 123,586 61,793 185,380 92,690 46,345 139,036 69,518 34,759 104,278 52,139 156,418 78,209 234,628 117,314 58,657 175,972 87,986 43,993 131,980 65,990 32,995 98,986 49,493 148,480 74,240 37,120 18,560 9,280 4,640 2,320 1,160 580 290 145 436 218 109 328 164 82 41