Properties of the Number 1976

One Thousand Nine Hundred Seventy-Six

Basics

Value: 1975 → 1976 → 1977

Parity: even

Prime: No

Previous Prime: 1973

Next Prime: 1979

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 13 × 19

Divisors: 1, 2, 4, 8, 13, 19, 26, 38, 52, 76

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110111000

Octal: 3670

Duodecimal: 1188

Hexadecimal: 7b8

Square: 3904576

Square Root: 44.45222154178574

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

Octagonal numbers: n*(3·n-2). Also called star numbers. A567

Generalized octagonal numbers: k*(3·k-2), k=0, +- 1, +- 2, +-3, ... A1082

Triangular numbers plus quarter squares: n*(n+1)/2 + floor(n²/4) (i.e., A000217(n) + A002620(n)). A6578

Multiples of 19 containing a 19 in their decimal representation. A121039

Numbers n such that Bernoulli number B_n has denominator 1590. A272140

Numbers with one fewer divisors than the sum of their prime indices. A325694

Expansion of 1/(1 - x³ - x⁵ - x⁷ + x¹⁰), inverse of a Salem polynomial. A143472

Number of primes < prime(n)². A879

a(n) = floor(n*φ⁹), where φ is the golden ratio, A001622. A4924

a(n) = n*(n + 14). A98848