394971904 has 36 divisors (see below), whose sum is σ = 790292160. Its totient is φ = 197012480.

The previous prime is 394971887. The next prime is 394971917. The reversal of 394971904 is 409179493.

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, 121014 + ... + 124234.

It is an arithmetic number, because the mean of its divisors is an integer number (21952560).

Almost surely, 2^394971904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394971904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395146080).

394971904 is an abundant number, since it is smaller than the sum of its proper divisors (395320256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394971904 is an equidigital number, since it uses as much as digits as its factorization.

394971904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716 (or 3702 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 394971904 is about 19873.9000701926. The cubic root of 394971904 is about 733.7059953469.

The spelling of 394971904 in words is "three hundred ninety-four million, nine hundred seventy-one thousand, nine hundred four".