988
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 1960
- Proper Divisor Sum (Aliquot Sum)
- 972
- 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
- 432
- Möbius Function
- 0
- Radical
- 494
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 49
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- neunhundertachtundachtzig· ordinal: neunhundertachtundachtzigste
- English
- nine hundred eighty-eight· ordinal: nine hundred eighty-eighth
- Spanish
- novecientos ochenta y ocho· ordinal: 988º
- French
- neuf cent quatre-vingt-huit· ordinal: neuf cent quatre-vingt-huitième
- Italian
- novecentoottantotto· ordinal: 988º
- Latin
- nongenti octoginta octo· ordinal: 988.
- Portuguese
- novecentos e oitenta e oito· ordinal: 988º
Appears in sequences
- Cake numbers: maximal number of pieces resulting from n planar cuts through a cube (or cake): C(n+1,3) + n + 1.at n=18A000125
- Essentially the same as A001611.at n=14A000381
- a(n) = Fibonacci(n) + 1.at n=16A001611
- a(n) = floor(n(n+2)(2n+1)/8).at n=15A002717
- Numbers that are the sum of 8 positive 6th powers.at n=13A003364
- Number of minimal covers of an (n + 1)-set by a collection of n nonempty subsets, a(n) = A035348(n,n-1).at n=6A003469
- Inverse Möbius transform of A003965.at n=42A003981
- a(n) = floor(n*phi^9), where phi is the golden ratio, A001622.at n=13A004924
- a(n) = round(n*phi^9), where phi is the golden ratio, A001622.at n=13A004944
- a(n) = ceiling(n*phi^7), where phi is the golden ratio, A001622.at n=34A004962
- Related to representations as sums of Fibonacci numbers.at n=47A006132
- Number of irreducible positions of size n in Montreal solitaire.at n=6A007076
- a(n) = a(n-1) + a(n-1-(number of odd terms so far)).at n=23A007604
- Coordination sequence T4 for Zeolite Code LTN.at n=22A008143
- Coordination sequence T8 for Zeolite Code PAU.at n=23A008226
- a(n) = Fibonacci(n) + (-1)^n.at n=16A008346
- Multiples of 19.at n=52A008601
- Coordination sequence T4 for Zeolite Code DFO.at n=24A009878
- Coordination sequence T2 for Zeolite Code WEI.at n=22A009918
- Coordination sequence T4 for Zeolite Code ZON.at n=22A009922