Properties of the Number 43990

Forty-Three Thousand Nine Hundred Ninety

Basics

Value: 43989 → 43990 → 43991

Parity: even

Prime: No

Previous Prime: 43987

Next Prime: 43991

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 53 × 83

Divisors: 1, 2, 5, 10, 53, 83, 106, 166, 265, 415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010101111010110

Octal: 125726

Duodecimal: 2155A

Hexadecimal: abd6

Square: 1935120100

Square Root: 209.73793171479497

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 nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically. A207808

Number of partitions of n that do not contain 5 as a part. A27339

Number of nX6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically. A207806

Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically. A207809

Expansion of ∏_k>=2 (1 + x^Fibonacci(k))/(1 - x^Fibonacci(k)). A300414

Numbers k such that 5 and 6 occur juxtaposed in the base-9 representation of k but not of k+1. A43990