Properties of the Number 2690

Two Thousand Six Hundred Ninety

Basics

Value: 2689 → 2690 → 2691

Parity: even

Prime: No

Previous Prime: 2689

Next Prime: 2693

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 269

Divisors: 1, 2, 5, 10, 269, 538, 1345, 2690

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010000010

Octal: 5202

Duodecimal: 1682

Hexadecimal: a82

Square: 7236100

Square Root: 51.86520991955976

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

Coordination sequence for hexagonal close-packing. A7899

Numbers m such that the Bernoulli number B_m has denominator 66. A51230

T(n,k) = number of n X k 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A223838

Hybrid binary rooted trees with n nodes whose root is labeled by "n". A11270

a(n) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1 and a(2) = a(3) = 2. A50047

Numbers k such that the coefficient of x^k in the expansion of ∏_j>=1 (1 - x^j)⁵ is zero. A302057

Let P1>=5, P2, P3 be consecutive primes, with P2-P1=2. a(n)=(P1+P2)/12 when P3-P2 sets a record. A329160

Rectangular table, read by ascending antidiagonals, in which the n-th row o.g.f. R(n,x) satisfies: [x^m] exp( m*(m+1) * x·R(n,x)ⁿ ) / R(n,x)^m+1 = 0 for m >= 1, n >= 0. A393620

O.g.f. A(x) satisfies: [xⁿ] exp( n*(n+1) * x·A(x)³ ) / A(x)ⁿ⁺¹ = 0 for n > 0. A393623

Number of N-equivalence classes of threshold functions of exactly n variables. A2079