Properties of the Number 71890

Seventy-One Thousand Eight Hundred Ninety

Basics

Value: 71889 → 71890 → 71891

Parity: even

Prime: No

Previous Prime: 71887

Next Prime: 71899

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 7 × 13 × 79

Divisors: 1, 2, 5, 7, 10, 13, 14, 26, 35, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100011010010

Octal: 214322

Duodecimal: 3572A

Hexadecimal: 118d2

Square: 5168172100

Square Root: 268.12310605391696

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 terms of the n-th row of triangle pertaining to A096130. A96131

Square array A(n,k), n >= 1, k >= 1, read by antidiagonals, where A(n,k) is ∑_j=1..n binomial(j·k, k). A323663

G.f. A(x) satisfies: A(x) = 1 + x·A(x²)/(1 - x)². A307889

Products of 5 distinct primes that are sandwiched between sphenic numbers. A376929

Expansion of (1 + x) * ∏_k>=1 (1 + x^k)/(1 - x^k). A309266

a(n) = A071888(n)-n. A71890

a(n) = sum of numbers formed using the digits of next n numbers. A81993