Properties of the Number 3864

Three Thousand Eight Hundred Sixty-Four

Basics

Value: 3863 → 3864 → 3865

Parity: even

Prime: No

Previous Prime: 3863

Next Prime: 3877

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 7 × 23

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 21

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111100011000

Octal: 7430

Duodecimal: 22A0

Hexadecimal: f18

Square: 14930496

Square Root: 62.161081071680215

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: Yes

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(1)=1, a(n)=a(n-1)+n if n even, a(n)=a(n-1)+n² if n is odd. A136047

Numbers k such that 2^k + 7 is prime. A57195

a(n) = 2·n² + 8·n. A67728

Partial sums of ceiling(n²/2) (A000982). A131941

3 times heptagonal numbers: a(n) = 3·n*(5·n-3)/2. A152773

When expressed in base 2 and then interpreted in base 7, is a multiple of the original number. A62848

a(n) = (5·n-7)*(n-1). A147874

Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=5. A135190

Numbers of the form p³*q·r*s where p, q, r, and s are distinct primes. A179670

Number of partitions of n containing a clique of size 5. A183562