Properties of the Number 8428

Eight Thousand Four Hundred Twenty-Eight

Basics

Value: 8427 → 8428 → 8429

Parity: even

Prime: No

Previous Prime: 8423

Next Prime: 8429

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 7 ² × 43

Divisors: 1, 2, 4, 7, 14, 28, 43, 49, 86, 98

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10000011101100

Octal: 20354

Duodecimal: 4A64

Hexadecimal: 20ec

Square: 71031184

Square Root: 91.804139340228

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

Sum of reciprocals of digits = 1. A37268

Number of compositions of n into a sum of odd primes. A2124

Numbers having exactly three representations by the quadratic form x²+xy+y² with 0<=x<=y. A198774

Numbers k with exactly three distinct prime factors and such that cototient(k) is a square. A306670

Write 0, 1, 2, 3, 4, ... in a triangular spiral, then a(n) is the sequence found by reading the terms along the line from 0 in the direction 0, 7, ... A62725

Restricted partitions. A49284

Largest achievable determinant of a 3 X 3 matrix whose elements are 9 distinct nonnegative integers chosen from the range 0..n. A97401

Number of partitions of n into powers of 2 or of 3. A131995

Number of ON cells at n-th stage in simple 2-dimensional cellular automaton (see Comments lines for definition). A256534

Triangle read by rows: T(n,k) is the number of configurations with exactly k polyomino matchings in a generalized game of memory played on the path of length 3n. A334056