Properties of the Number 2380

Two Thousand Three Hundred Eighty

Basics

Value: 2379 → 2380 → 2381

Parity: even

Prime: No

Previous Prime: 2377

Next Prime: 2381

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 7 × 17

Divisors: 1, 2, 4, 5, 7, 10, 14, 17, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100101001100

Octal: 4514

Duodecimal: 1464

Hexadecimal: 94c

Square: 5664400

Square Root: 48.78524367060187

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

Pentagonal numbers: a(n) = n*(3·n-1)/2. A326

Binomial coefficient binomial(n,4) = n*(n-1)*(n-2)*(n-3)/24. A332

4 times triangular numbers: a(n) = 2·n*(n+1). A46092

Number of ways of choosing at most n-1 items from a set of size 2·n+1. A8549

Sum of all parts of the last section of the set of partitions of n. A138879

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 3.6.3.6 2D tiling (cf. A008579). A299256

Number of intersections of diagonals in the interior of a regular n-gon. A6561

Triangle read by rows: T(n, k) = binomial(n+k-1, 2·k-1). A78812

Partial sums of powers of 13 (A001022). A91030

a(n) = ∑_k=0..5 binomial(n,k). A6261