394218 has 36 divisors (see below), whose sum is σ = 944034. Its totient is φ = 118800.

The previous prime is 394211. The next prime is 394223. The reversal of 394218 is 812493.

It can be written as a sum of positive squares in only one way, i.e., 393129 + 1089 = 627^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 394191 and 394200.

It is not an unprimeable number, because it can be changed into a prime (394211) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2088 + ... + 2268.

2³⁹⁴²¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472017).

394218 is an abundant number, since it is smaller than the sum of its proper divisors (549816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394218 is a wasteful number, since it uses less digits than its factorization.

394218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 197 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 394218 is about 627.8678204845. The cubic root of 394218 is about 73.3238876723.

The spelling of 394218 in words is "three hundred ninety-four thousand, two hundred eighteen".