890
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1620
- Proper Divisor Sum (Aliquot Sum)
- 730
- 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
- 352
- Möbius Function
- -1
- Radical
- 890
- Omega Function (Ω)
- 3
- 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
- 72
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- achthundertneunzig· ordinal: achthundertneunzigste
- English
- eight hundred ninety· ordinal: eight hundred ninetieth
- Spanish
- ochocientos noventa· ordinal: 890º
- French
- huit cent quatre-vingt-dix· ordinal: huit cent quatre-vingt-dixième
- Italian
- ottocentonovanta· ordinal: 890º
- Latin
- octingenti nonaginta· ordinal: 890.
- Portuguese
- oitocentos e noventa· ordinal: 890º
Appears in sequences
- Number of paraffins C_n H_{2n-1} X_3 with n carbon atoms.at n=8A000641
- Numbers in which every digit contains at least one loop (version 1).at n=44A001743
- Numbers that are the sum of 9 positive 5th powers.at n=32A003354
- Numbers that are a sum of distinct positive cubes in more than one way.at n=27A003998
- Number of rooted trees with 4 nodes of disjoint sets of labels with union {1..n}. If a node has an empty set of labels then it must have at least two children.at n=4A005174
- Number of walks on cubic lattice.at n=9A005570
- a(n) = 1 + n/2 + 9*n^2/2.at n=14A006137
- Theta series of laminated lattice LAMBDA_13^{mid}.at n=2A006916
- 3x+1 sequence starting at 97.at n=46A008873
- 3x+1 sequence starting at 63.at n=35A008874
- 3x+1 sequence starting at 95.at n=33A008875
- 3x+1 sequence starting at 27.at n=39A008884
- If a, b in sequence, so is ab+6.at n=14A009307
- Coordination sequence T2 for Zeolite Code VSV.at n=19A009915
- Coordination sequence for Ni2In, Position Ni1 and In.at n=9A009941
- Coordination sequence for alpha-Mn, Position Mn2.at n=8A009951
- Expansion of 1/((1-x)^2*Product_{k>=1} (1-x^k)).at n=12A014153
- Number of 7's in all the partitions of n into distinct parts.at n=47A015742
- Number of partitions of n into distinct parts, none being 7.at n=41A015754
- Seven iterations of Reverse and Add are needed to reach a palindrome.at n=16A015986