394957568 has 36 divisors (see below), whose sum is σ = 791420448. Its totient is φ = 196715520.

The previous prime is 394957561. The next prime is 394957621. The reversal of 394957568 is 865759493.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (394957561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66530 + ... + 72222.

Almost surely, 2^394957568 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 394957568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395710224).

394957568 is an abundant number, since it is smaller than the sum of its proper divisors (396462880).

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

394957568 is an equidigital number, since it uses as much as digits as its factorization.

394957568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980 (or 5966 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 56.

The square root of 394957568 is about 19873.5393928711. The cubic root of 394957568 is about 733.6971183134.

The spelling of 394957568 in words is "three hundred ninety-four million, nine hundred fifty-seven thousand, five hundred sixty-eight".