394806213 has 24 divisors (see below), whose sum is σ = 587025920. Its totient is φ = 255584160.

The previous prime is 394806127. The next prime is 394806233. The reversal of 394806213 is 312608493.

It is not a de Polignac number, because 394806213 - 2⁹ = 394805701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394806233) 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 23 ways as a sum of consecutive naturals, for example, 38820 + ... + 47922.

Almost surely, 2^394806213 is an apocalyptic number.

It is an amenable number.

394806213 is a deficient number, since it is larger than the sum of its proper divisors (192219707).

394806213 is a wasteful number, since it uses less digits than its factorization.

394806213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249 (or 9246 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 394806213 is about 19869.7310751807. The cubic root of 394806213 is about 733.6033842648.

The spelling of 394806213 in words is "three hundred ninety-four million, eight hundred six thousand, two hundred thirteen".