394425905 has 8 divisors (see below), whose sum is σ = 473418432. Its totient is φ = 315469168.

The previous prime is 394425901. The next prime is 394425929. The reversal of 394425905 is 509524493.

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

It is a cyclic number.

It is not a de Polignac number, because 394425905 - 2² = 394425901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394425901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34412 + ... + 44418.

It is an arithmetic number, because the mean of its divisors is an integer number (59177304).

Almost surely, 2^394425905 is an apocalyptic number.

It is an amenable number.

394425905 is a deficient number, since it is larger than the sum of its proper divisors (78992527).

394425905 is a wasteful number, since it uses less digits than its factorization.

394425905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17895.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 394425905 is about 19860.1587355187. The cubic root of 394425905 is about 733.3677540088.

The spelling of 394425905 in words is "three hundred ninety-four million, four hundred twenty-five thousand, nine hundred five".