2,780,240

2⁴ × 5 × 23 × 1511

2,780,240 has digital root 5. The neighboring primes are 2780233 and 2780243; its proper-divisor sum differs from the starting integer by 1,189,088.

Prime Factor Structure

Factorization String 2^4 × 5 × 23 × 1511

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 40

Divisor Sum (σ) 6,749,568

Proper Divisor Sum 3,969,328

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #2780233 ← → #2780243

Radix Representation

Decimal	2780240
Binary	1010100110110001010000 (22 bits)
Octal	0o12466120
Hexadecimal	0x2A6C50

Divisor Catalog (40)

1 2 4 5 8 10 16 20 23 40 46 80 92 115 184 230 368 460 920 1,511 1,840 3,022 6,044 7,555 12,088 15,110 24,176 30,220 34,753 60,440 69,506 120,880 139,012 173,765 278,024 347,530 556,048 695,060 1,390,120 2,780,240

Collatz Trajectory (169 steps to reach 1)

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

2,780,240 1,390,120 695,060 347,530 173,765 521,296 260,648 130,324 65,162 32,581 97,744 48,872 24,436 12,218 6,109 18,328 9,164 4,582 2,291 6,874 3,437 10,312 5,156 2,578 1,289 3,868 1,934 967 2,902 1,451 4,354 2,177 6,532 3,266 1,633 4,900 2,450 1,225 3,676 1,838 919 2,758 1,379 4,138 2,069 6,208 3,104 1,552 776 388 194 97 292 146 73 220 110 55 166 83

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