394646788 has 12 divisors (see below), whose sum is σ = 720659520. Its totient is φ = 188744072.

The previous prime is 394646753. The next prime is 394646803. The reversal of 394646788 is 887646493.

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, 2144728 + ... + 2144911.

It is an arithmetic number, because the mean of its divisors is an integer number (60054960).

Almost surely, 2^394646788 is an apocalyptic number.

It is an amenable number.

394646788 is a deficient number, since it is larger than the sum of its proper divisors (326012732).

394646788 is a wasteful number, since it uses less digits than its factorization.

394646788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289666 (or 4289664 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

The square root of 394646788 is about 19865.7189147536. The cubic root of 394646788 is about 733.5046265608.

The spelling of 394646788 in words is "three hundred ninety-four million, six hundred forty-six thousand, seven hundred eighty-eight".