Properties of the Number 7818

Seven Thousand Eight Hundred Eighteen

Basics

Value: 7817 → 7818 → 7819

Parity: even

Prime: No

Previous Prime: 7817

Next Prime: 7823

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 1303

Divisors: 1, 2, 3, 6, 1303, 2606, 3909, 7818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111010001010

Octal: 17212

Duodecimal: 4636

Hexadecimal: 1e8a

Square: 61121124

Square Root: 88.41945487278238

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Cardinality of set of sets of parts of all partitions of n. A88314

Values of the difference d for 5 primes in arithmetic progression with the minimal start sequence {5 + j·d}, j = 0 to 4. A206039

Number T(n,k) of ordered set partitions of [n] where k is minimal such that for each block b the smallest integer interval containing b has at most k elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A276891

Weak Goodstein sequence starting at 11. A137411

Sums of distinct powers of 6. A33043

Triangle T(n,k), read by rows n>=0 with terms k=1..3ⁿ, where row n lists the coefficients in the n-th iteration of (x+x²+x³). A166880

T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero. A231063

Least positive integer k such that prime(k·n)+2 = prime(i·n)*prime(j·n) for some 0 < i < j. A257926

Expansion of ∏_k>0 1/(1 + x^k)^k·3. A279031

Number of free polyominoes of site-perimeter n. A366443