Properties of the Number -285390

Two Hundred Eighty-Five Thousand Three Hundred Ninety

Basics

Value: -285391 → -285390 → -285389

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 5 × 7 × 151

Divisors: 1, 2, 3, 5, 6, 7, 9, 10, 14, 15

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000101101011001110

Octal: -1055316

Duodecimal: -1191A6

Hexadecimal: -45ace

Square: 81447452100

Square Root: 534.2190561932437

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

a(n) = n⁴ - (n-1)⁴ + (n-2)⁴ - ... 0⁴. A62392

Numbers k such that 2^k == -1 (mod k-1). A55685

Doubly hexagonal numbers. A63249

Number of unlabeled 7-ary cacti having n polygons. A54369

Semiperimeter of the unique primitive Pythagorean triple whose inradius is A000045(n) and such that its long leg and its hypotenuse are consecutive natural numbers. A382609

Numbers k such that 8^k == -1 (mod k-1). A55691

Numbers n such that n-1 is a divisor of 3ⁿ + 5ⁿ. A234535

Numbers n such that n and its 10's complement are both triangular numbers; that is, n and 10^k - n (where k is the number of digits in n) are triangular numbers. A68812

Triangle, read by rows, T(n, k) = binomial(n·binomial(n, floor((n-k)/2)), k). A157109

Half the number of length n integer sequences with sum zero and sum of squares 8. A157534