Properties of the Number 28790

Twenty-Eight Thousand Seven Hundred Ninety

Basics

Value: 28789 → 28790 → 28791

Parity: even

Prime: No

Previous Prime: 28789

Next Prime: 28793

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 2879

Divisors: 1, 2, 5, 10, 2879, 5758, 14395, 28790

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000001110110

Octal: 70166

Duodecimal: 147B2

Hexadecimal: 7076

Square: 828864100

Square Root: 169.67616214424464

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 index of the smallest triangular number containing exactly n 4's. A48359

Total number of parts that are not the smallest part in all partitions of n. A182984

Smallest number with "natural" logarithm n, cf. A061373. A182061

Shifts left and divides by 2 under the XOR BINOMIAL transform (A099902). A99901

Pisot sequence E(7,15), a(n)=[ a(n-1)²/a(n-2)+1/2 ]. A14001

Number of nX5 0..1 arrays with every element equal to 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. A298084

T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. A298087

Fermat pseudoprimes to base 2 divisible by 15. A216364

Nonsquares mod 77. A28790