Properties of the Number 16438

Sixteen Thousand Four Hundred Thirty-Eight

Basics

Value: 16437 → 16438 → 16439

Parity: even

Prime: No

Previous Prime: 16433

Next Prime: 16447

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 8219

Divisors: 1, 2, 8219, 16438

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000000110110

Octal: 40066

Duodecimal: 961A

Hexadecimal: 4036

Square: 270207844

Square Root: 128.2107639786925

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

T(n,k) = Number of n X k binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally. A188523

Numbers m > 3 such that m-1, m, m+1 belong to A307002. A340748

Partitions with parts repeated at most twice and repetition only allowed if first part has an even index (first index = 1). A227135

a(n) = n·prime(prime(n)) - prime(n)². A230098

The number of isomorphism classes of subgroups of the symmetric group S_n. A174511

Numbers which do not reach zero under either of the iterations: x -> floor(sqrt(x)) * (x - floor(sqrt(x))²) or y -> ceiling(sqrt(y)) * (ceiling(sqrt(y))² - y). A219963

a(n) = ∑_k=1..n k·sigma₃(k). A356126

From George Gilbert's marks problem: jumping 4 marks at a time (initial positions). A19595

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 72 ones. A31840

A156977/3. A164565