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Properties of the Number 90028

Ninety Thousand Twenty-Eight

Basics

Value: 90027 → 90028 → 90029

Parity: even

Prime: No

Previous Prime: 90023

Next Prime: 90031

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 2 × 71 × 317

Divisors: 1, 2, 4, 71, 142, 284, 317, 634, 1268, 22507

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: 10101111110101100

Octal: 257654

Duodecimal: 44124

Hexadecimal: 15fac

Square: 8105040784

Square Root: 300.04666303760155

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 greatest integer k such that k/Fibonacci(n) < π. A293677
Main diagonal of square arrays A114881 and A249741. A249743
p-INVERT of the positive integers, where p(S) = (1 - S2)2. A290926
Triangle of Mahonian numbers T(n,k): coefficients in expansion of ∏i=0..n-1 (1 + x + ... + xi), where k ranges from 0 to A000217(n-1). Also enumerates permutations by their major index. A8302
Triangle read by rows: T(n,k) is the number of even permutations of {1,2,...,n} having k descents (n >= 1, k >= 0). A145882
List of Restricted-Growth Strings ak-1ak-2...a2a1, with k=2 and a1 in {0,1} or k>2, ak-1=1 and aj+1>=1+aj, for k-1>j>0. A239903
Number of distinct lines through the origin in 6-dimensional cube of side length n. A90028
The number of pairs of permutations in the product group Sn X Sn with k common descents, n >= 1 and 0 <= k <= n-1. A192721
Triangle read by rows: T(n,k) is the number of odd permutations of {1,2,...,n} having k descents. (n>=1, k>=1). A145883
Number of transpose-complementary plane partitions of n. A181119

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