878
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1320
- Proper Divisor Sum (Aliquot Sum)
- 442
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 438
- Möbius Function
- 1
- Radical
- 878
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 54
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- achthundertachtundsiebzig· ordinal: achthundertachtundsiebzigste
- English
- eight hundred seventy-eight· ordinal: eight hundred seventy-eighth
- Spanish
- ochocientos setenta y ocho· ordinal: 878º
- French
- huit cent soixante-dix-huit· ordinal: huit cent soixante-dix-huitième
- Italian
- ottocentosettantotto· ordinal: 878º
- Latin
- octingenti septuaginta octo· ordinal: 878.
- Portuguese
- oitocentos e setenta e oito· ordinal: 878º
Appears in sequences
- Conjecturally largest even integer which is an unordered sum of two primes in exactly n ways.at n=14A000954
- a(n) is the solution to the postage stamp problem with n denominations and 4 stamps.at n=12A001214
- Numbers k such that phi(2k-1) < phi(2k), where phi is Euler's totient function A000010.at n=10A001836
- Numerators of approximations to e.at n=16A006258
- Numbers not of form p + 2^x + 2^y.at n=14A006286
- Inverse Moebius transform of triangular numbers.at n=38A007437
- Coordination sequence T3 for Zeolite Code MEL.at n=19A008152
- Coordination sequence T7 for Zeolite Code MTT.at n=18A008195
- Coordination sequence T1 for Zeolite Code NES.at n=19A008205
- Coordination sequence T4 for Zeolite Code STI.at n=20A008237
- Coordination sequence T3 for Zeolite Code THO.at n=21A008240
- Expansion of 1/( Product_{j=0..5} (1-x^(2*j+1)) ).at n=47A008675
- Coordination sequence T1 for Zeolite Code WEI.at n=21A009917
- Continued fraction for cube root of 99.at n=62A010327
- Numbers k such that phi(k) + 3 | sigma(k + 3).at n=43A015782
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=9A015984
- Numbers k such that the continued fraction for sqrt(k) has period 16.at n=35A020355
- Position of 2*n^2 in A000404 (sums of 2 nonzero squares).at n=38A024517
- n written in fractional base 9/8.at n=26A024656
- Position of n^2 + 5 in A000408.at n=32A024801