Properties of the Number 28408

Twenty-Eight Thousand Four Hundred Eight

Basics

Value: 28407 → 28408 → 28409

Parity: even

Prime: No

Previous Prime: 28403

Next Prime: 28409

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 53 × 67

Divisors: 1, 2, 4, 8, 53, 67, 106, 134, 212, 268

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111011111000

Octal: 67370

Duodecimal: 14534

Hexadecimal: 6ef8

Square: 807014464

Square Root: 168.54672942540296

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 1:4:sqrt(17) proportioned triangles on a (n+1) X (n+1) grid. A189884

Number of partitions of n with rank 3 or higher (the rank of a partition is the largest part minus the number of parts). A363230

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 27 ones. A31795

G.f. A(x) satisfies A(x/A(x)) = 1/(1-x)². A145159

Row sums of triangle in A147724. A147725

a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function. A27917

Floor((xⁿ - (1-x)ⁿ)/2 +.5) where x = (sqrt(4)+1)/2 = 3/2. A136423

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 0), (0, -1, 0), (0, 1, 1), (1, 1, 0)}. A150465

Number of types of Boolean functions of n variables under a certain group. A28408