394571968 has 56 divisors (see below), whose sum is σ = 923730944. Its totient is φ = 163641600.

The previous prime is 394571893. The next prime is 394572001. The reversal of 394571968 is 869175493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 28093.

Almost surely, 2^394571968 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 394571968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461865472).

394571968 is an abundant number, since it is smaller than the sum of its proper divisors (529158976).

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

394571968 is a wasteful number, since it uses less digits than its factorization.

394571968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28461 (or 28451 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 394571968 is about 19863.8356819623. The cubic root of 394571968 is about 733.4582692556.

The spelling of 394571968 in words is "three hundred ninety-four million, five hundred seventy-one thousand, nine hundred sixty-eight".