394145210 has 8 divisors (see below), whose sum is σ = 709461396. Its totient is φ = 157658080.

The previous prime is 394145209. The next prime is 394145237. The reversal of 394145210 is 12541493.

It can be written as a sum of positive squares in 2 ways, for example, as 393982801 + 162409 = 19849^2 + 403^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19707251 + ... + 19707270.

Almost surely, 2^394145210 is an apocalyptic number.

394145210 is a deficient number, since it is larger than the sum of its proper divisors (315316186).

394145210 is a wasteful number, since it uses less digits than its factorization.

394145210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39414528.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 394145210 is about 19853.0906913760. The cubic root of 394145210 is about 733.1937445515.

The spelling of 394145210 in words is "three hundred ninety-four million, one hundred forty-five thousand, two hundred ten".