148
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 266
- Proper Divisor Sum (Aliquot Sum)
- 118
- 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
- 72
- Möbius Function
- 0
- Radical
- 74
- Omega Function (Ω)
- 3
- 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
- 23
- 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
- einshundertachtundvierzig· ordinal: einshundertachtundvierzigste
- English
- one hundred forty-eight· ordinal: one hundred forty-eighth
- Spanish
- ciento cuarenta y ocho· ordinal: 148º
- French
- cent quarante-huit· ordinal: cent quarante-huitième
- Italian
- centoquarantotto· ordinal: 148º
- Latin
- centum quadraginta octo· ordinal: 148.
- Portuguese
- cento e quarenta e oito· ordinal: 148º
Appears in sequences
- Numbers k such that (2k)^4 + 1 is prime.at n=42A000059
- Generalized tangent numbers d(n,1).at n=45A000061
- a(n) = floor(n^(3/2)).at n=28A000093
- a(n) = floor(e^n).at n=5A000149
- Nearest integer to e^n.at n=5A000227
- Numbers that are the sum of 2 nonzero squares.at n=50A000404
- Numbers that are the sum of 2 but no fewer nonzero squares.at n=48A000415
- Number of 7-dimensional partitions of n.at n=3A000427
- Euler transform of A000579.at n=3A000428
- Numbers that are the sum of 2 squares but not sum of 3 nonzero squares.at n=21A000549
- Heptagonal numbers (or 7-gonal numbers): n*(5*n-3)/2.at n=8A000566
- A Beatty sequence: [ n(e+1) ].at n=39A000572
- Number of graphs with n nodes and floor(n(n-1)/4) edges.at n=6A000717
- Numbers n such that the sum of the squares of n consecutive positive odd numbers x^2 + (x+2)^2 + ... + (x+2n-2)^2 = k^2 for some integer k. The least values of x and k for each n are in A056131 and A056132, respectively.at n=11A001033
- Numbers m such that Sum_{k=0..m-1} exp(2*Pi*i*k^3/m) != 0.at n=40A001074
- From least significant term in expansion of E( tr (X'*X)^n ), X rectangular and Gaussian. Also number of types of sequential n-swap moves for traveling salesman problem.at n=4A001171
- Triangle of values of 2-d recurrence.at n=59A001404
- High temperature series for partition function for spin-1/2 Ising model on b.c.c. lattice.at n=3A001406
- Number of graphs with n nodes and n-2 edges.at n=8A001430
- Numbers that are the sum of 2 squares.at n=61A001481