Properties of the Number 64728

Sixty-Four Thousand Seven Hundred Twenty-Eight

Basics

Value: 64727 → 64728 → 64729

Parity: even

Prime: No

Previous Prime: 64717

Next Prime: 64747

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 29 × 31

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111110011011000

Octal: 176330

Duodecimal: 31560

Hexadecimal: fcd8

Square: 4189713984

Square Root: 254.4169805653703

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

Number of edges formed by drawing the lines connecting any two of the 2*(n+2) perimeter points of a 3 X (n+1) rectangular grid of points (or equally, a 2 X n grid of squares). A331765

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j) = gcd(2ⁱ-1, 2^j-1) (A204116). A204117

Cubes written in base 9. A4639

a(n) is the number of nonsymmetric patterns (no reflective, nor rotational symmetry) which may be formed by an equilateral triangular arrangement of closely packed black and white cells satisfying the local matching rule of Pascal's triangle modulo 2, where n is the number of cells in each edge of the arrangement. The matching rule is such that any elementary top-down triangle of three neighboring cells in the arrangement contains either one or three white cells. A60551

Partial sums of A100119. Sum of first n of the n-th centered n-gonal numbers. A130218

Solutions to A064494(n) = 2(n+1). A64728