Properties of the Number 8408

Eight Thousand Four Hundred Eight

Basics

Value: 8407 → 8408 → 8409

Parity: even

Prime: No

Previous Prime: 8389

Next Prime: 8419

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 1051

Divisors: 1, 2, 4, 8, 1051, 2102, 4204, 8408

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000011011000

Octal: 20330

Duodecimal: 4A48

Hexadecimal: 20d8

Square: 70694464

Square Root: 91.6951470907812

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

Tetranacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4), with a(0)=a(1)=0, a(2)=1, a(3)=2. A1630

Numbers k such that π(k) divides k. A57809

a(n) is smallest number m such that m = n*π(m), where π(k) = number of primes <= k (A000720). A38625

Number T(n,k) of equivalence classes of ways of placing k 3 X 3 tiles in an n X 7 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=3, 0<=k<=2·floor(n/3), read by rows. A238556

Discriminants of imaginary quadratic fields with class number 26 (negated). A351664

G.f.: ∑_k>=1 x^2·k/(1+x^2·k) * ∏_k>=1 (1+x^k)/(1-x^k). A305122

Consecutive min and max-terms of solution-clusters of A057809, i,e, least and largest solutions to n=x/A000720[x]. A87241

Sums of two primes (in increasing order) when equal to the product of their prime-counting functions. A272860

a(n) = ∑_k=1..n (-1)^n-k*binomial(n,k)*σ(k). A320568

Numbers n divisible by π(n) [A057809] with prime π(n); i.e., largest prime factor of n equals π(n). A71394