Properties of the Number 28938

Twenty-Eight Thousand Nine Hundred Thirty-Eight

Basics

Value: 28937 → 28938 → 28939

Parity: even

Prime: No

Previous Prime: 28933

Next Prime: 28949

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 13 × 53

Divisors: 1, 2, 3, 6, 7, 13, 14, 21, 26, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 111000100001010

Octal: 70412

Duodecimal: 148B6

Hexadecimal: 710a

Square: 837407844

Square Root: 170.1117279907532

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) = (n+1)*(n²+n+2)/2; g.f.: (1 + 2·x²) / (1 - x)⁴. A6000

a(n) = 3·2*1 - 6·5*4 + 9·8*7 - 12·11·10 + 15·14·13 - 18·17·16 + ... - (up to the n-th term). A319886

Numbers n such that n divides the denominator of 2n-th Bernoulli number. A106741

Numbers m such that the GCD of the x's that satisfy σ(x) = m is 4. A241649

a(n) = 4394·n - 1820. A156627

The fifth term of the greedy B_n set of natural numbers. A369817

Numbers k such that card({x|σ(x)=k}) > 1 and (∑_σ(x)=k x) < k. A258931

The number of monic integer polynomials of degree n all of whose roots are distinct and of modulus at most 1. A280709

Numerators of continued fraction convergents to sqrt(617). A42184

Expansion of e.g.f.: (1-x)^-1-x. A73479