84218 has 8 divisors (see below), whose sum is σ = 133812. Its totient is φ = 39616.

The previous prime is 84211. The next prime is 84221. The reversal of 84218 is 81248.

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 1849 = 287^2 + 43^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 84193 and 84202.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84218.

It is not an unprimeable number, because it can be changed into a prime (84211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205 + ... + 1272.

2⁸⁴²¹⁸ is an apocalyptic number.

84218 is a deficient number, since it is larger than the sum of its proper divisors (49594).

84218 is a wasteful number, since it uses less digits than its factorization.

84218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496.

The product of its digits is 512, while the sum is 23.

The square root of 84218 is about 290.2033769617. The cubic root of 84218 is about 43.8330449878.

The spelling of 84218 in words is "eighty-four thousand, two hundred eighteen".