Properties of the Number 22644

Twenty-Two Thousand Six Hundred Forty-Four

Basics

Value: 22643 → 22644 → 22645

Parity: even

Prime: No

Previous Prime: 22643

Next Prime: 22651

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 17 × 37

Divisors: 1, 2, 3, 4, 6, 9, 12, 17, 18, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100001110100

Octal: 54164

Duodecimal: 11130

Hexadecimal: 5874

Square: 512750736

Square Root: 150.47923444781344

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

Numbers k such that the digits of σ(k) are a permutation of those of k, in base 10. A115920

Number of n-step walks on square lattice in the first quadrant which finish at distance n-3 from the x-axis. A5564

Perimeters of nondegenerate triangles with integer areas, whose side lengths are triangular numbers. A385737

Numbers n such that gcd(n, φ(n)) = gcd(φ(n), σ(n)) = gcd(σ(n), n) = τ(n). A217301

Expansion of ∏_k>=0 (1 + x^{3^k})^{3^(k+1}). A321354

a(n) = (7·n+1)*(7·n+6). A1526

a(n) = prime(n)² - prime(n+1). A62235

a(n) = A000203(n)² - A001157(n) - 2n = σ(n)² - sigma₂(n) - 2n. A66294

a(n) = floor(6ⁿ/5ⁿ). A94983

a(n) = 17·n*(n+1). A173308