Properties of the Number 40549

Forty Thousand Five Hundred Forty-Nine

Basics

Value: 40548 → 40549 → 40550

Parity: odd

Prime: No

Previous Prime: 40543

Next Prime: 40559

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 23 × 41 × 43

Divisors: 1, 23, 41, 43, 943, 989, 1763, 40549

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111001100101

Octal: 117145

Duodecimal: 1B571

Hexadecimal: 9e65

Square: 1644221401

Square Root: 201.367822652975

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 6*φ(k) = 5*σ(k). A65823

G.f.: exp( ∑_n>=1 sigma₂(n)*sigma₃(n)/σ(n) * xⁿ / n ), where sigma_k(n) equals the sum of the k-th powers of the divisors of n. A320416

Triangle read by rows: number of topologies of n nested circles intersecting at most as triples, according to number of factors. A281350

a(n) = (1/n) ∑_k=0..n ∑_d∣n φ(d) A241171(n/d, k) for n >= 1, a(0) = 1. A327026

Continued fraction for sqrt(573). A40549