Properties of the Number 68940

Sixty-Eight Thousand Nine Hundred Forty

Basics

Value: 68939 → 68940 → 68941

Parity: even

Prime: No

Previous Prime: 68927

Next Prime: 68947

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 5 × 383

Divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000110101001100

Octal: 206514

Duodecimal: 33A90

Hexadecimal: 10d4c

Square: 4752723600

Square Root: 262.5642778444928

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

a(n) = ∑_i=0..n binomial(2·n+i,n-i). A108080

First differences of A057793. A228113

Sum along upward diagonal of Pascal triangle to center. A10752

Triangle read by rows, coefficients of polynomials in t = log(x) of the n-th derivative of x^x³, evaluated at x = 1. T(n, k) with n >= 0 and 0 <= k <= n. A293474

a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+1)/2 ], T given by A026725. A26847

T(n,n-4), array T as in A038730. A38733

Maximum number of chess queens that can be placed on a 3-dimensional chessboard of order n so that no two queens attack each other. A68940