Properties of the Number 40820

Forty Thousand Eight Hundred Twenty

Basics

Value: 40819 → 40820 → 40821

Parity: even

Prime: No

Previous Prime: 40819

Next Prime: 40823

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 13 × 157

Divisors: 1, 2, 4, 5, 10, 13, 20, 26, 52, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001111101110100

Octal: 117564

Duodecimal: 1B758

Hexadecimal: 9f74

Square: 1666272400

Square Root: 202.03960007879644

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

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384649. A384653

G.f. A(x) satisfies A(x) = 1/( 1 - x·A(x·A(x)⁴) ). A384649

Shifts left 2 places under "BHK" (reversible, identity, unlabeled) transform. A32104

Number of quasi-Carmichael numbers less than 10ⁿ. A263930

Continued fraction for sqrt(850). A40820