394018 has 4 divisors (see below), whose sum is σ = 591030. Its totient is φ = 197008.

The previous prime is 394007. The next prime is 394019. The reversal of 394018 is 810493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 305809 + 88209 = 553^2 + 297^2 .

It is a junction number, because it is equal to n+sod(n) for n = 393983 and 394001.

It is not an unprimeable number, because it can be changed into a prime (394019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98503 + ... + 98506.

2³⁹⁴⁰¹⁸ is an apocalyptic number.

394018 is a deficient number, since it is larger than the sum of its proper divisors (197012).

394018 is a wasteful number, since it uses less digits than its factorization.

394018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197011.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 394018 is about 627.7085310875. The cubic root of 394018 is about 73.3114856864.

The spelling of 394018 in words is "three hundred ninety-four thousand, eighteen".