ℕ atory
Play Now

Properties of the Number -7728

Seven Hundred Twenty-Eight

Basics

Value: -7729 → -7728 → -7727

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 4 × 3 × 7 × 23

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -1111000110000

Octal: -17060

Duodecimal: -4580

Hexadecimal: -1e30

Square: 59721984

Square Root: 87.90904390334364

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 n-th powers of the roots of the (reduced) weight enumerator of the extended Golay code (1 + 759·x2 + 2576·x3 + 759·x4 + x6). A122192
cos(arcsin(x)*arcsin(x))=1-12/4!*x4-240/6!*x6-7728/8!*x8... A12344
cos(arctan(x)*arcsin(x))=1-12/4!*x4+120/6!*x6-7728/8!*x8... A12436
Numbers k such that p(k), p(k)+6, p(k)+12, p(k)+18 are consecutive primes, where p(k) denotes k-th prime. A90832
a(n) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2p+1 and p is the unique integer such that 2p < n - 1 <= 2p+1, starting with a(1) = 1, a(2) = 2, and a(3) = 3. A50051
Numbers k such that σ(x) = k has exactly 7 solutions. A60663
Numbers of the form p4*q·r*s where p, q, r, and s are distinct primes. A179693
Area A of the cyclic quadrilaterals such that A, the sides and the radius of the circumcircle are integers. A210250
Number of intersections formed within a triangle by placing n points "in general position" on each of the three sides and connecting each point to each of the points on the other two sides using straight lines. A365929
Primitive terms of A023197: numbers k such that σ(k)/k >= 3, but for every proper divisor, d∣k, d<k, σ(d)/d < 3. A388019