Properties of the Number 228

Two Hundred Twenty-Eight

Basics

Value: 227 → 228 → 229

Parity: even

Prime: No

Previous Prime: 227

Next Prime: 229

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 19

Divisors: 1, 2, 3, 4, 6, 12, 19, 38, 57, 76

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100100

Octal: 344

Duodecimal: 170

Hexadecimal: e4

Square: 51984

Square Root: 15.0996688705415

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

Abundant numbers (sum of divisors of m exceeds 2m). A5101

Average of twin prime pairs. A14574

List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's. A14486

a(n) = prime(n) - 1. A6093

Multiples of 4. A8586

Refactorable numbers: number of divisors of k divides k. Also known as τ numbers. A33950

a(n) = prime(n) + 1. A8864

Practical numbers: positive integers m such that every k <= σ(m) is a sum of distinct divisors of m. Also called panarithmic numbers. A5153

Zumkeller or integer-perfect numbers: numbers n whose divisors can be partitioned into two disjoint sets with equal sum. A83207

Numbers that are products of 4 primes. A14613