Properties of the Number -17639

Seventeen Thousand Six Hundred Thirty-Nine

Basics

Value: -17640 → -17639 → -17638

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 31 × 569

Divisors: 1, 31, 569, 17639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100010011100111

Octal: -42347

Duodecimal: -A25B

Hexadecimal: -44e7

Square: 311134321

Square Root: 132.8118970574549

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! * ∑_{k=0..floor(n/5)} (-n)^k / (k! * (n-5·k)!). A362324

Trajectory of n under the Reverse and Add! operation carried out in base 3 (presumably) does not reach a palindrome and (presumably) does not join the trajectory of any term m < n. A77405

a(1)=1, a(2)=2; for n >= 2, a(n+1) = a(n) + sum of prime factors of a(n). A96461

Number of parts in all partitions of all the numbers in {1,2,...,n} into distinct parts. A15724

Number of partitions of n into deficient numbers. A97797

a(n) = 10·n² - 1. A158447

Convolution of (F(2), F(3), F(4), ...) and odd numbers. A23652

Number of partitions of the n-th deficient number into deficient numbers. A97799

a(n) = 40·n² - 1. A158598

Expansion of ∏_k>=1 (1 + x^k)^A050985(k). A301596