Properties of the Number 27440

Twenty-Seven Thousand Four Hundred Forty

Basics

Value: 27439 → 27440 → 27441

Parity: even

Prime: No

Previous Prime: 27437

Next Prime: 27449

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5 × 7 ³

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110101100110000

Octal: 65460

Duodecimal: 13A68

Hexadecimal: 6b30

Square: 752953600

Square Root: 165.65023392678924

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

Primal codes of finite permutations on positive integers. A109297

Number of reduced words of length n in the Weyl group B₇. A161716

Scaled Chebyshev U-polynomials evaluated at i·sqrt(7)/2. Generalized Fibonacci sequence. A57090

Numbers k such that the half-alternating sum of the partition having Heinz number k is 1. A357635

Irregular triangle read by rows of normalized Girard-Waring formula (cf. A210258), for m=8 data values. A288188

Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-shortest cycle has length exactly k; n >= 0, 0 <= k <= max(0,n-2). A350016

Numbers of the form p⁴*q³*r where p, q, and r are distinct primes. A179698

2-parking triangle T(r, i, 2) read by rows: T(r, i, k) = (r + 1)^i-1*binomial(k*(r + 1) + r - i - 1, r - i) with k = 2 and 0 <= i <= r. A329058

G.f.: (1 + x⁴ + x⁷ + 2·x⁸ + x⁹ + x¹² + x¹⁶)/∏_i=1..8 (1 - xⁱ). A3405

Sums of terms of groups in A075621. A75625