Properties of the Number 2986

Two Thousand Nine Hundred Eighty-Six

Basics

Value: 2985 → 2986 → 2987

Parity: even

Prime: No

Previous Prime: 2971

Next Prime: 2999

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 1493

Divisors: 1, 2, 1493, 2986

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101110101010

Octal: 5652

Duodecimal: 188A

Hexadecimal: baa

Square: 8916196

Square Root: 54.644304369257

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

Number of partitions of n into nonprime parts. A2095

Number of integer partitions of n having a part that can be written as a nonnegative linear combination of the other (possibly equal) parts. A364913

Triangle read by rows: row n is the first row of the matrix M[n]^n-1, where M[n] is the n X n tridiagonal matrix with main diagonal (2,4,4,...) and super- and subdiagonals (1,1,1,...). A124575

Array T(n,k) read by antidiagonals: T(n,k) is the number of [n,k]-triangulations in the plane that have reflection symmetry, n >= 0, k >= 0. A169809

Numbers n such that Q(sqrt(n)) has class number 10. A218042

Numbers that are not the sum of a square and a prime. A14090

Number of meaningful differential operations of the n-th order on the space R⁹. A90994

T(n,k)=half the number of nXk binary arrays with each element equal to at least two neighbors. A180760

Row 3 of table A162430. A162432

Number of partitions of [n] where the first k elements are marked (0 <= k <= n) and at least k blocks contain their own index. A347420