394765990 has 8 divisors (see below), whose sum is σ = 710578800. Its totient is φ = 157906392.

The previous prime is 394765963. The next prime is 394766003. The reversal of 394765990 is 99567493.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19738290 + ... + 19738309.

It is an arithmetic number, because the mean of its divisors is an integer number (88822350).

Almost surely, 2^394765990 is an apocalyptic number.

394765990 is a deficient number, since it is larger than the sum of its proper divisors (315812810).

394765990 is a wasteful number, since it uses less digits than its factorization.

394765990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39476606.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The square root of 394765990 is about 19868.7188816994. The cubic root of 394765990 is about 733.5784701592.

The spelling of 394765990 in words is "three hundred ninety-four million, seven hundred sixty-five thousand, nine hundred ninety".