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Properties of the Number 18449

Eighteen Thousand Four Hundred Forty-Nine

Basics

Value: 18448 → 18449 → 18450

Parity: odd

Prime: No

Previous Prime: 18443

Next Prime: 18451

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 19 × 971

Divisors: 1, 19, 971, 18449

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000010001

Octal: 44021

Duodecimal: A815

Hexadecimal: 4811

Square: 340365601

Square Root: 135.827095971312

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

Composite numbers whose divisors (except 1) all contain the digit 9. A62680
Numbers k where sin(k) increases monotonically to 1 (or cosec(k) decreases). A46959
a(n) = (9 + 14·n + 12·n2 + 4·n3)/3. A166911
Numbers m such that A338038(m) = A338038(A004086(m)) where A004086(i) is i read backwards and A338038(i) is the sum of the primes and exponents in the prime factorization of i ignoring 1-exponents; palindromes and multiples of 10 are excluded. A338039
Non-palindromic n and its digit reversal have the same sum of prime factors (with repetition). A85607
Number of 4X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2·n2 (number of collections of 4 zero-sum 2-vectors with total modulus squared not more than 2·n2, ignoring vector and component permutations). A192703
Floor(AGM(n2, n3)), where AGM denotes the arithmetic-geometric mean. A234362
Numbers k where cos(k) decreases monotonically to 0. A46957
Non-palindromic composite numbers such that n' = [Rev(n)]', where n' is the arithmetic derivative of n. A259077
Divisors of 428. A18449