Properties of the Number 6400

Six Thousand Four Hundred

Basics

Value: 6399 → 6400 → 6401

Parity: even

Prime: No

Previous Prime: 6397

Next Prime: 6421

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ⁸ × 5 ²

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 25, 32

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1100100000000

Octal: 14400

Duodecimal: 3854

Hexadecimal: 1900

Square: 40960000

Square Root: 80

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Even squares: a(n) = (2·n)². A16742

Numbers of the form 2ⁱ*5^j with i, j >= 0. A3592

Numbers that are divisible by exactly 10 primes with multiplicity. A46314

a(n) is the maximal number of a's that can be produced in a blank document with n "keystrokes". A193286

Numbers whose prime factors are 2 and 5. A33846

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of 1 as ∑_k=0..n T(n,k)*binomial(n,k). A244116

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of nⁿ as Sum(k=0..n)T(n,k)*binomial(n,k). A244134

Perfect powers of nonsquarefree numbers k that are not squareful. A386762

Numbers k such that A102489(k) is divisible by k. A32563

a(n) = (4·n)². A16802