Properties of the Number 23980

Twenty-Three Thousand Nine Hundred Eighty

Basics

Value: 23979 → 23980 → 23981

Parity: even

Prime: No

Previous Prime: 23977

Next Prime: 23981

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 11 × 109

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101110110101100

Octal: 56654

Duodecimal: 11A64

Hexadecimal: 5dac

Square: 575040400

Square Root: 154.85477067239486

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

Coefficients in the expansion of ∏_m>=1 (1 - q^13·m)/(1 - q^m). A341714

Long legs of the only primitive Pythagorean triple whose inradius is the n-th prime and whose short leg is an odd number. A367573

a(n) = 1000·n - 20. A157515

a(n) = 2662·n + 22. A157613

a(n) = [xⁿ] ∏_k=1..n 1/(1-k^k*x). A299035

Numbers k such that sum of the divisors of k equals the sum of the reversals of the divisors of k. Numbers with all palindrome divisors are not in the sequence. A196677

Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 9. A238920

Number of strings of numbers x(i=1..5) in 0..n with sum i²*x(i) equal to n·25. A183956

Table read by rows: row n is the unique primitive Pythagorean triple (a,b,c) such that (a-b+c)/2 = A002378(n) and its long leg and hypotenuse are consecutive natural numbers. A385022

a(n) = prime(n)*(prime(n-1) + prime(n+1)). A357679