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Properties of the Number 28197

Twenty-Eight Thousand One Hundred Ninety-Seven

Basics

Value: 28196 → 28197 → 28198

Parity: odd

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 2 × 13 × 241

Divisors: 1, 3, 9, 13, 39, 117, 241, 723, 2169, 3133

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000100101

Octal: 67045

Duodecimal: 14399

Hexadecimal: 6e25

Square: 795070809

Square Root: 167.91962362987834

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

a(n) is the (n+1)st (n+2)-gonal number. A64808
Left edge of the triangle A045975. A204556
40-gonal numbers: a(n) = 38·n*(n-1)/2 + n. A261191
Numerators of continued fraction convergents to sqrt(457). A41870
Partitions with parts repeated at most twice and repetition only allowed if first part has an odd index (first index = 1). A227134
Positions of records in A096303. A229743
Triangle read by rows: T(n,k) is the number of chains in the poset of plane partitions ordered by inclusion that end with a plane partition of n and have length k. A389604
Numbers n such that Fn(x) and Fn(1-x) have a common factor mod 2, with Fn(x) = U(n-1,x/2) the monic Chebyshev polynomials of second kind; this lists only the primitive elements of the set. A94425
Number of n X 5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically. A207166
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 501", based on the 5-celled von Neumann neighborhood. A272566