747,756

2² × 3² × 20771

747,756 has digital root 9. The neighboring primes are 747743 and 747763; its proper-divisor sum differs from the starting integer by 394,740.

Prime Factor Structure

Factorization String 2^2 × 3^2 × 20771

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 18

Divisor Sum (σ) 1,890,252

Proper Divisor Sum 1,142,496

Digit Sum / Digital Root 36 (Root: 9)

Adjacent Primes #747743 ← → #747763

1 2 3 4 6 9 12 18 36 20,771 41,542 62,313 83,084 124,626 186,939 249,252 373,878 747,756

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

747,756 373,878 186,939 560,818 280,409 841,228 420,614 210,307 630,922 315,461 946,384 473,192 236,596 118,298 59,149 177,448 88,724 44,362 22,181 66,544 33,272 16,636 8,318 4,159 12,478 6,239 18,718 9,359 28,078 14,039 42,118 21,059 63,178 31,589 94,768 47,384 23,692 11,846 5,923 17,770 8,885 26,656 13,328 6,664 3,332 1,666 833 2,500 1,250 625 1,876 938 469 1,408 704 352 176 88 44 22