Properties of the Number 3940

Three Thousand Nine Hundred Forty

Basics

Value: 3939 → 3940 → 3941

Parity: even

Prime: No

Previous Prime: 3931

Next Prime: 3943

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 197

Divisors: 1, 2, 4, 5, 10, 20, 197, 394, 788, 985

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 111101100100

Octal: 7544

Duodecimal: 2344

Hexadecimal: f64

Square: 15523600

Square Root: 62.76941930590086

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

Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566

Number of combinatory separations of normal multisets of weight n. A269134

Expansion of ∏_m>=1 (1 + q^m)^m; number of partitions of n into distinct parts, where n different parts of size n are available. A26007

a(n) = n concatenated with n + 1. A1704

Numbers n such that Bernoulli number B_n has denominator 330. A272183

Numbers k such that 2^k + 15 is prime. A57197

T(n,k)=Number of -k..k arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences. A200204

Total number of parts in all overpartitions of n. A235792

G.f. satisfies: A(x) = (1+x) * A(x²)*A(x³)*A(x⁴)*...*A(xⁿ)*... A129373

Numbers k > 1 such that, in base 6, k and k² contain the same digits in the same proportion. A61660