394912018 has 8 divisors (see below), whose sum is σ = 593846460. Its totient is φ = 196963200.

The previous prime is 394911977. The next prime is 394912027. The reversal of 394912018 is 810219493.

It can be written as a sum of positive squares in 2 ways, for example, as 382710969 + 12201049 = 19563^2 + 3493^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245403 + ... + 247006.

Almost surely, 2^394912018 is an apocalyptic number.

394912018 is a deficient number, since it is larger than the sum of its proper divisors (198934442).

394912018 is a wasteful number, since it uses less digits than its factorization.

394912018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492812.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 394912018 is about 19872.3933636590. The cubic root of 394912018 is about 733.6689117487.

The spelling of 394912018 in words is "three hundred ninety-four million, nine hundred twelve thousand, eighteen".