Properties of the Number 9940

Nine Thousand Nine Hundred Forty

Basics

Value: 9939 → 9940 → 9941

Parity: even

Prime: No

Previous Prime: 9931

Next Prime: 9941

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 7 × 71

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011011010100

Octal: 23324

Duodecimal: 5904

Hexadecimal: 26d4

Square: 98803600

Square Root: 99.69954864491613

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

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 3.6.3.6 2D tiling (cf. A008579). A299256

a(n) = ∑_{k=1..n, gcd(n,k) = 1} k². A53818

Numbers k such that 2^k+1 - 1 is prime. A90748

a(n) = 4·n*(2·n + 1). A33586

Coefficients of the '3rd-order' mock θ function ω(q). A53253

Numbers k such that k² divides 13^k - 1. A128393

a(n) = floor( γ(n+1/3) ). A14511

Sum of largest parts of all partitions of n into odd parts. A92322

Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 3 + 3·x, p(n,x) = u·p(n-1,x) + v·p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2·x - x². A367301

Nearest integer to γ(n + 1/3). A14516