394370818 has 8 divisors (see below), whose sum is σ = 592545600. Its totient is φ = 196855620.

The previous prime is 394370813. The next prime is 394370833. The reversal of 394370818 is 818073493.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (394370813) by changing a digit.

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, 163398 + ... + 165793.

It is an arithmetic number, because the mean of its divisors is an integer number (74068200).

Almost surely, 2^394370818 is an apocalyptic number.

394370818 is a deficient number, since it is larger than the sum of its proper divisors (198174782).

394370818 is a wasteful number, since it uses less digits than its factorization.

394370818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329792.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 394370818 is about 19858.7718149940. The cubic root of 394370818 is about 733.3336107896. Note that the first 3 decimals are identical.

The spelling of 394370818 in words is "three hundred ninety-four million, three hundred seventy thousand, eight hundred eighteen".