Properties of the Number -29890

Twenty-Nine Thousand Eight Hundred Ninety

Basics

Value: -29891 → -29890 → -29889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 7 ² × 61

Divisors: 1, 2, 5, 7, 10, 14, 35, 49, 61, 70

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111010011000010

Octal: -72302

Duodecimal: -1536A

Hexadecimal: -74c2

Square: 893412100

Square Root: 172.88724649319857

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

Triangular numbers with property that digits alternate in parity. A68882

a(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A063720). A343314

Triangular numbers which are the sum of two squares. A73613

a(n) = n·Pell(n) * ∑_d∣n 1/(d·Pell(d)) where Pell(n) = A000129(n). A203414

Smith triangular numbers. A98840

Numbers k such that λ(k) = λ(k+1). A173695

Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and w·x<=3·y*z. A211812

Triangular numbers with sum of digits = 28. A68132

Triangular numbers which are also happy numbers (cf. A007770). A76712

Row sums of triangle A093922. A93925