394785939 has 8 divisors (see below), whose sum is σ = 529109392. Its totient is φ = 261826560.

The previous prime is 394785929. The next prime is 394785959. The reversal of 394785939 is 939587493.

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

It is not a de Polignac number, because 394785939 - 2⁹ = 394785427 is a prime.

It is a super-2 number, since 2×394785939² = 311711875264223442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394785929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340342 + ... + 341499.

It is an arithmetic number, because the mean of its divisors is an integer number (66138674).

Almost surely, 2^394785939 is an apocalyptic number.

394785939 is a deficient number, since it is larger than the sum of its proper divisors (134323453).

394785939 is a wasteful number, since it uses less digits than its factorization.

394785939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682037.

The product of its digits is 7348320, while the sum is 57.

The square root of 394785939 is about 19869.2208956466. The cubic root of 394785939 is about 733.5908267711.

The spelling of 394785939 in words is "three hundred ninety-four million, seven hundred eighty-five thousand, nine hundred thirty-nine".