Properties of the Number 308

Three Hundred Eight

Basics

Value: 307 → 308 → 309

Parity: even

Prime: No

Previous Prime: 307

Next Prime: 311

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 11

Divisors: 1, 2, 4, 7, 11, 14, 22, 28, 44, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100110100

Octal: 464

Duodecimal: 218

Hexadecimal: 134

Square: 94864

Square Root: 17.549928774784245

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

Numbers that are the sum of 2 successive primes. A1043

Numbers that are products of 4 primes. A14613

Sum of totient function: a(n) = ∑_k=1..n φ(k), cf. A000010. A2088

Expansion of e.g.f. (2 - e^x)^-2. A5649

Expansion of 1/((1-x)⁴*(1+x)). A2623

Nontotients: even numbers k such that φ(m) = k has no solution. A5277

Numbers k such that k divides 1 + ∑_j=1..k prime(j)² = 1 + A024450(k). A128166

Multiples of 7. A8589

Multiples of 11. A8593

Denominators a(n) of Pythagorean approximations b(n)/a(n) to sqrt(2). A195500