Properties of the Number 24806

Twenty-Four Thousand Eight Hundred Six

Basics

Value: 24805 → 24806 → 24807

Parity: even

Prime: No

Previous Prime: 24799

Next Prime: 24809

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 79 × 157

Divisors: 1, 2, 79, 157, 158, 314, 12403, 24806

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110000011100110

Octal: 60346

Duodecimal: 12432

Hexadecimal: 60e6

Square: 615337636

Square Root: 157.49920634720672

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

Product of a prime and the following number. A36690

T(n,k)=Number of arrangements of n+1 nonzero numbers x(i) in -k..k with the sum of floor(x(i)/x(i+1)) equal to zero. A189498

a(n) = 25·n² + 25·n + 6. A177059

Deficient oblong numbers. A77804

a(n) = (4·n+1)*(4·n+2) = (4·n+2)!/(4·n)!. A157870

a(n) = (7·n + 3)*(7·n + 4). A177071

a(n) = ∑_d∣n (n/d)^d-1 * binomial(d+n-1,n). A363663

a(n) = (9·n+4)*(9·n+5). A177073

Consider a number of k digits n = d_k*10^k-1 + d_k-1*10^k-2 + … + d₂*10 + d₁. Sequence lists the numbers n such that φ(n) = ∑_i=1..k-1{σ(∑_j=1..i{d_j*10^j-1})} (see example below). A240897

Irregular table read by rows: T(0,0) = 2 and T(n,2k) = T(n-1,k)+1, T(n,2k+1) = T(n-1,k)*(T(n-1,k)+1) for 0 <= k < 2^n-1. A273317