3902
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5856
- Proper Divisor Sum (Aliquot Sum)
- 1954
- 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
- 1950
- Möbius Function
- 1
- Radical
- 3902
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 175
- Smith Number
- no
- Vampire 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
Appears in sequences
- Numbers n such that n! has a square number of digits.at n=46A006488
- Coordination sequence T2 for Zeolite Code -PAR.at n=44A009856
- Numbers k such that k^2 is palindromic in base 7.at n=33A029992
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 62.at n=4A031560
- Number of partitions of n into parts not of the form 11k, 11k+4 or 11k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 4 are greater than 1.at n=33A035947
- Number of partitions of n such that cn(1,5) < cn(0,5) = cn(2,5) < cn(3,5) = cn(4,5).at n=77A036861
- Numbers whose base-4 representation contains exactly one 0 and four 3's.at n=35A045070
- Coordination sequence T1 for Zeolite Code AEN.at n=39A047950
- Numbers n such that prime(n) - sigma(n) - phi(n) = prime(n+1) - sigma(n+1) - phi(n+1), where sigma(n) = sum of divisors of n.at n=39A048783
- a(n)=T(n,n), array T as in A049723.at n=35A049728
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 20.at n=11A050969
- Number of primes in the interval [prime(n), prime(n)^2].at n=43A054272
- Expansion of g.f. Product_{n>=1} (1-x^n)*(1-x^(5*n))/(1-x^(3*n))^2.at n=45A054274
- Coordination sequence T5 for Zeolite Code MTF.at n=37A057308
- McKay-Thompson series of class 52A for Monster.at n=53A058705
- Least number which may be expressed as the sum of a prime number and a nonzero square in exactly n different ways.at n=21A064283
- Row sums of A077070.at n=45A077071
- Pseudo-random numbers: MS C 6.0 version.at n=22A084275
- Semiprimes sandwiched between semiprimes.at n=42A086005
- Numbers n such that n and n+1 are semiprimes with a semiprime number of 1's in their binary representation.at n=43A086097