394532218 has 8 divisors (see below), whose sum is σ = 592666848. Its totient is φ = 196976604.

The previous prime is 394532191. The next prime is 394532239. The reversal of 394532218 is 812235493.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143046 + ... + 145777.

It is an arithmetic number, because the mean of its divisors is an integer number (74083356).

Almost surely, 2^394532218 is an apocalyptic number.

394532218 is a deficient number, since it is larger than the sum of its proper divisors (198134630).

394532218 is a wasteful number, since it uses less digits than its factorization.

394532218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289508.

The product of its digits is 51840, while the sum is 37.

The square root of 394532218 is about 19862.8350947190. The cubic root of 394532218 is about 733.4336383917.

It can be divided in two parts, 3945 and 32218, that added together give a palindrome (36163).

The spelling of 394532218 in words is "three hundred ninety-four million, five hundred thirty-two thousand, two hundred eighteen".