Properties of the Number 78888

Seventy-Eight Thousand Eight Hundred Eighty-Eight

Basics

Value: 78887 → 78888 → 78889

Parity: even

Prime: No

Previous Prime: 78887

Next Prime: 78889

Digit Sum: 39

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 19 × 173

Divisors: 1, 2, 3, 4, 6, 8, 12, 19, 24, 38

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011010000101000

Octal: 232050

Duodecimal: 397A0

Hexadecimal: 13428

Square: 6223316544

Square Root: 280.8700767258769

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

Numbers k such that A(k+1) = A(k) + 3, where A() = A005100() are the deficient numbers. A317046

Square array read by antidiagonals downwards: for n >= 2, T(k,n) is the number of permutations of [k+n] that differ in every position from both the identity permutation and a permutation consisting of k 1-cycles and one n-cycle. A335391

Numbers having four 8's in base 10. A43524

Terms of A001273 with trailing 9's stripped (at n=13 term becomes periodic with period 49). A18785

Numbers k such that k⁷ - 1 and k⁷ + 1 are semiprimes. A279272

Triangle read by rows, T(n,k) = binomial(n, k)*hypergeom2F1(k - n, n + 1, k + 2, -2) for n >= 0 and 0 <= k <= n. A297704

Decimal expansion of Sum {n>=0} 1/7^2ⁿ. A78888

Smallest number that takes n steps to reach 1 under iteration of sum-of-squares-of-digits map (= smallest "happy number" of height n). A1273

Number of tilings of a 3 X n rectangle using pentominoes of any shape and monominoes. A278875