Properties of the Number 13440

Thirteen Thousand Four Hundred Forty

Basics

Value: 13439 → 13440 → 13441

Parity: even

Prime: No

Previous Prime: 13421

Next Prime: 13441

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ⁷ × 3 × 5 × 7

Divisors: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010010000000

Octal: 32200

Duodecimal: 7940

Hexadecimal: 3480

Square: 180633600

Square Root: 115.9310139695155

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

Triangle whose (i,j)-th entry is binomial(i,j)*2^i-j. A38207

Triangle of coefficients in expansion of (1+2·x)ⁿ. A13609

Numbers that are divisible by exactly 10 primes with multiplicity. A46314

Triangle read by rows. T(n, k) are the coefficients of the Hermite polynomial of order n, for 0 <= k <= n. A60821

G.f.: q * ∏_m>=1 (1-q^m)⁸*(1-q^2m)⁸. A2288

a(n) = 2^n-4*C(n,4). A3472

The smallest representative of each (bigomega(n),ω(n)) pair. A70175

Strongly refactorable numbers: numbers n such that if n is divisible by d, it is divisible by the number of divisors of d. A141586

Smallest k such that σ(x) = k has exactly n solutions. A7368

Numbers with exactly 4 distinct prime divisors {2,3,5,7}. A147571