ℕ atory
Play Now

Properties of the Number 19444

Nineteen Thousand Four Hundred Forty-Four

Basics

Value: 19443 → 19444 → 19445

Parity: even

Prime: No

Previous Prime: 19441

Next Prime: 19447

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 2 × 4861

Divisors: 1, 2, 4, 4861, 9722, 19444

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101111110100

Octal: 45764

Duodecimal: B304

Hexadecimal: 4bf4

Square: 378069136

Square Root: 139.44174410842686

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

Number of compositions of n whose run-lengths are unimodal. A332726
a(n) = 2*(n3 + n2 + n - 1). A155120
Number of trapezoids, distinct up to congruence, on an n X n grid (or geoboard). A181945
p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S2 - S4. A291400
Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 76 ones. A31844
Coordination sequence for octagonal tiling is a(n) + A103908(n)*sqrt(2). A103909
Number of right triangles on a (n+1) X 4 grid. A189808
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood. A270463
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 758", based on the 5-celled von Neumann neighborhood. A273490
a1, a2, ..., is a permutation of the positive integers such that the average of each initial segment is an integer, using the greedy algorithm to define an. A19444