Properties of the Number 1390

One Thousand Three Hundred Ninety

Basics

Value: 1389 → 1390 → 1391

Parity: even

Prime: No

Previous Prime: 1381

Next Prime: 1399

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 139

Divisors: 1, 2, 5, 10, 139, 278, 695, 1390

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101101110

Octal: 2556

Duodecimal: 97A

Hexadecimal: 56e

Square: 1932100

Square Root: 37.282703764614496

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

Triangle read by rows: T(n,k) is the number of compositions of n into nonzero parts with k parts directly followed by a different part, n>=0, 0<=k<=A004523(n-1). A238279

Triangle read by rows in which row n (n >= 1) gives coefficients in expansion of the polynomial f(n) * ∏_i=1..n-1 f(2i), where f(k) = (1 - x^k)/(1-x). A162206

Number of reduced words of length n in the Weyl group D₆. A162209

Numbers m such that the Bernoulli number B_m has denominator 66. A51230

Number of partitions of n in which the least part is even. A26805

Fibonacci-Pascal triangle read by rows. A36355

Vertex number of a square spiral in which the length of the first two edges are the legs of the primitive Pythagorean triple [3, 4, 5]. The edges of the spiral have length A195019. A195020

Coordination sequence for (2,3,8) tiling of hyperbolic plane. A265058

a(n) = n*(7·n - 1)/2. A22264

Sum of first n nonprimes. A51349