Properties of the Number 440

Four Hundred Forty

Basics

Value: 439 → 440 → 441

Parity: even

Prime: No

Previous Prime: 439

Next Prime: 443

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 5 × 11

Divisors: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111000

Octal: 670

Duodecimal: 308

Hexadecimal: 1b8

Square: 193600

Square Root: 20.97617696340303

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

Sum of the first n primes. A7504

a(n) = n*(n+2) = (n+1)² - 1. A5563

Triangle formed from even-numbered columns of triangle of expansions of powers of·in terms of Chebyshev polynomials U_n(x). A39599

Numbers having k prime factors (counted with multiplicity), the largest of which is the k-th prime. A106529

a(n) = binomial(n+3, 3)/4 for odd n, n*(n+2)*(n+4)/24 for even n. A6918

Sum of positive integers in smallest positive reduced residue system modulo n. a(1) = 1 by convention. A23896

Multiples of 10: a(n) = 10·n. A8592

Numbers that are products of 5 primes (or 5-almost primes, a generalization of semiprimes). A14614

Half the number of 3 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row. A69429

Triangle read by rows: T(n,k) is number of partitions of n with Durfee square of size k (n>=1; 1<=k<=floor(sqrt(n))). A115994