1390
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2520
- Proper Divisor Sum (Aliquot Sum)
- 1130
- 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
- 552
- Möbius Function
- -1
- Radical
- 1390
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 127
- Smith Number
- no
- Vampire 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
Appears in sequences
- Coordination sequence T1 for Zeolite Code LTL.at n=28A008138
- Coordination sequence for tridymite, lonsdaleite, and wurtzite.at n=23A008264
- Numbers k such that phi(k) | sigma_11(k).at n=47A015769
- Expansion of 1/(1 - x^10 - x^11 - x^12 - x^13 - x^14 - x^15 - x^16).at n=63A017892
- Numbers n such that n is a substring of its square in base 3 (written in base 10).at n=15A018827
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite EUO = EU-1 Nan[AlnSi112-nO224] starting with a T3 atom.at n=10A019122
- Numbers k such that the continued fraction for sqrt(k) has period 34.at n=5A020373
- Fibonacci sequence beginning 1, 15.at n=11A022105
- a(n) = n*(7*n - 1)/2.at n=20A022264
- Numbers k such that Fibonacci(k) == 55 (mod k).at n=25A023181
- Coordination sequence T1 for Zeolite Code MWW.at n=25A024986
- Index of 5^n within the sequence of the numbers of the form 4^i*5^j.at n=48A025706
- Index of 6^n within the sequence of the numbers of the form 5^i*6^j (A025622).at n=49A025715
- Index of 8^n within the sequence of the numbers of the form 6^i*8^j.at n=48A025730
- Index of 8^n within the sequence of the numbers of the form 7^i*8^j.at n=50A025731
- Index of 9^n within the sequence of the numbers of the form 9^i*10^j.at n=53A025739
- Number of partitions of n in which the least part is even.at n=32A026805
- Euler transform of {1, primes}.at n=10A030012
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 16 ones.at n=31A031784
- Numbers with exactly five distinct base-6 digits.at n=0A031983