Properties of the Number 45640

Forty-Five Thousand Six Hundred Forty

Basics

Value: 45639 → 45640 → 45641

Parity: even

Prime: No

Previous Prime: 45631

Next Prime: 45641

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 163

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011001001001000

Octal: 131110

Duodecimal: 224B4

Hexadecimal: b248

Square: 2083009600

Square Root: 213.63520309162533

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

Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p that are < p/2. A282721

Nonunitary weird numbers: numbers that are nonunitary abundant but not nonunitary pseudoperfect. A327948

Principal diagonal of the convolution array A213828. A213829

a(n) = n*(n+1)*(3·n²+5·n+4)/12. A176060

Number of symmetric 0-1 matrices with nondecreasing row sums. A351288

Number of nonempty subsets of {1, 2, ..., n} with <=6 pairwise coprime elements. A187267

Distance from 2ⁿ to the nearest base-10 palindrome. A393111

a(n) = (2·n³ + 5·n² - 17·n)/2. A162259

Number of 4-step self-avoiding walks on an n X n square summed over all starting positions. A188149

Triangle read by rows, coefficients of polynomials in t = log(x) of the n-th derivative of x^x², evaluated at x = 1. T(n, k) with n >= 0 and 0 <= k <= n. A293473