Properties of the Number -191890

One Hundred Ninety-One Thousand Eight Hundred Ninety

Basics

Value: -191891 → -191890 → -191889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 31 × 619

Divisors: 1, 2, 5, 10, 31, 62, 155, 310, 619, 1238

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -101110110110010010

Octal: -566622

Duodecimal: -9306A

Hexadecimal: -2ed92

Square: 36821772100

Square Root: 438.0525082681299

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

This table shows the coefficients of combinatorial formulas needed for generating the sequential sums of p-th powers of binomial coefficients C(n,5). The p-th row (p>=1) contains a(i,p) for i=1 to 5·p-4, where a(i,p) satisfies ∑_i=1..n C(i+4,5)^p = 6·C(n+5,6) * ∑_i=1..5·p-4 a(i,p) * C(n-1,i-1)/(i+5). A87109

Triangular numbers which are sums of 4 consecutive primes. A173420

Triangular numbers n such that each decimal digit of n is equal to the difference of at least two other digits of n. A255917

Triangular numbers whose digit reversal is a brilliant number (A078972). A115678

Hexagonal numbers for which both the sum of the digits and the product of the digits are also hexagonal numbers. A117064

Sequence of distinct least triangular numbers such that the arithmetic mean of the first n terms is also a triangular number. Initial term is 0. A236415