ℕ atory
Play Now

Properties of the Number 7800

Seven Thousand Eight Hundred

Basics

Value: 7799 → 7800 → 7801

Parity: even

Prime: No

Previous Prime: 7793

Next Prime: 7817

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 3 × 3 × 5 2 × 13

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111001111000

Octal: 17170

Duodecimal: 4620

Hexadecimal: 1e78

Square: 60840000

Square Root: 88.31760866327846

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) = n*(n+1)*(n+2)/2. A27480
Orders of noncyclic simple groups (without repetition). A1034
Shortest edge c of (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a2 + b2), sqrt(b2 + c2), sqrt(a2 + c2) are integers). A31175
10 times triangular numbers: a(n) = 5·n*(n + 1). A124080
Number T(n,k) of binary words of length n with exactly k (possibly overlapping) occurrences of the subword given by the binary expansion of n; triangle T(n,k), n>=0, read by rows. A233940
Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero. A256879
Orders of finite perfect groups (groups such that G = G' where G' is the commutator subgroup of G). A60793
Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=13. A135198
Generalized Mancala solitaire (A002491); to get n-th term, start with n and successively round up to next 11 multiples of n-1, n-2, ..., 1, for n>=1. A113748
Neither the unsorted prime signature of a(n) nor the negated unsorted prime signature of a(n) is unimodal. A332643