Properties of the Number 4420

Four Thousand Four Hundred Twenty

Basics

Value: 4419 → 4420 → 4421

Parity: even

Prime: No

Previous Prime: 4409

Next Prime: 4421

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 13 × 17

Divisors: 1, 2, 4, 5, 10, 13, 17, 20, 26, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1000101000100

Octal: 10504

Duodecimal: 2684

Hexadecimal: 1144

Square: 19536400

Square Root: 66.48308055437865

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

Number of points on surface of tetrahedron; coordination sequence for sodalite net (equals 2·n²+2 for n > 0). A5893

Numbers whose base-16 expansion has no run of digits with length < 2. A33029

Every run of digits of n in base 16 has length 2. A33014

Numbers m that are the hypotenuse of exactly 13 distinct integer-sided right triangles, i.e., m² can be written as a sum of two squares in 13 ways. A97102

Numbers k such that the geometric mean of φ(k) and σ(k) is an integer. A11257

a(n) = (6·n)!*(2·n)!/((4·n)!*(3·n)!*n!). A211419

Number of ways of writing n as the sum of 10 triangular numbers from A000217. A226254

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 3 6 or 7. A252532

Alternating factorials: 0! - 1! + 2! - ... + (-1)ⁿ n! A58006

Numbers k such that k² divides 21^k-1. A128401