Properties of the Number 16490

Sixteen Thousand Four Hundred Ninety

Basics

Value: 16489 → 16490 → 16491

Parity: even

Prime: No

Previous Prime: 16487

Next Prime: 16493

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 17 × 97

Divisors: 1, 2, 5, 10, 17, 34, 85, 97, 170, 194

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000001101010

Octal: 40152

Duodecimal: 9662

Hexadecimal: 406a

Square: 271920100

Square Root: 128.41339493993607

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+1) = a(n) + n (if n is odd), a(n+1) = a(n) * n (if n is even). A47904

Given the infinite continued fraction i+(i/(i+(i/(i+...)))), where i is the square root of (-1), this is the denominator of the imaginary part of the convergents. A91809

Expansion of e.g.f. 1/(1 - 2·x*exp(x)). A351762

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0ⁿ and T(n,k) = k * ∑_r=0..n binomial(n,r) * binomial(3·n+r+k,n)/(3·n+r+k) for k > 0. A378238

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * ∑_j=0..n k^n-j * (n-j)^j/j!. A351761

Engel expansion of ζ(3) = 1.20206... . A53980

Numbers which are the sum of two squared primes in exactly three ways (ignoring order). A226562

Numbers k that are the product of four distinct primes such that x²+y² = k has integer solutions. A248712

Numbers that can be represented as a sum of two distinct nontrivial prime powers in three or more ways. A225104

a(n) = smallest k such that the base-2 Reverse and Add! trajectory of A075252(n) joins the trajectory of k. A92211