42818 has 8 divisors (see below), whose sum is σ = 65280. Its totient is φ = 21060.
The previous prime is 42797. The next prime is 42821. The reversal of 42818 is 81824.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a super-2 number, since 2×428182 = 3666762248, which contains 22 as substring.
It is an Ulam number.
It is a plaindrome in base 7.
It is a nialpdrome in base 16.
It is a junction number, because it is equal to n+sod(n) for n = 42793 and 42802.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 293.
It is an arithmetic number, because the mean of its divisors is an integer number (8160).
242818 is an apocalyptic number.
42818 is a deficient number, since it is larger than the sum of its proper divisors (22462).
42818 is a wasteful number, since it uses less digits than its factorization.
42818 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 352.
The product of its digits is 512, while the sum is 23.
The square root of 42818 is about 206.9251072248. The cubic root of 42818 is about 34.9844829175.
The spelling of 42818 in words is "forty-two thousand, eight hundred eighteen".
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