Properties of the Number 39440

Thirty-Nine Thousand Four Hundred Forty

Basics

Value: 39439 → 39440 → 39441

Parity: even

Prime: No

Previous Prime: 39439

Next Prime: 39443

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 5 × 17 × 29

Divisors: 1, 2, 4, 5, 8, 10, 16, 17, 20, 29

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001101000010000

Octal: 115020

Duodecimal: 1A9A8

Hexadecimal: 9a10

Square: 1555513600

Square Root: 198.59506539690256

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 four third powers in exactly seven ways. A345151

Number of edges formed inside a right triangle by the straight line segments mutually connecting all vertices and points on the two shorter edges whose positions on one edge equal the Farey series of order n while on the other they divide its length into n equal segments. A359976

a(n) = ∑_{k=0..floor(n/5)} (-1)^k * binomial(n+4,5·k+4) * Catalan(k). A360051

Expansion of e.g.f. arcsinh(sin(x)) (odd powers only). A12495

a(n) = n*(n²+4). A155965

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 366", based on the 5-celled von Neumann neighborhood. A287854

Number of points on surface of 4-dimensional cube. A8511

Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, up, up. A177537

Expansion of ∑_k>0 (1/(1-x^k)⁵ - 1). A363695

a(n) = n*(n - 1)*(n² + 1)/2. A71252