394628808 has 64 divisors (see below), whose sum is σ = 1131500160. Its totient is φ = 112352256.

The previous prime is 394628807. The next prime is 394628809. The reversal of 394628808 is 808826493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (394628807) and next prime (394628809).

It is a super-2 number, since 2×394628808² = 311463792207001728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394628807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45216 + ... + 53232.

It is an arithmetic number, because the mean of its divisors is an integer number (17679690).

Almost surely, 2^394628808 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 394628808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565750080).

394628808 is an abundant number, since it is smaller than the sum of its proper divisors (736871352).

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

394628808 is a wasteful number, since it uses less digits than its factorization.

394628808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326 (or 8322 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 394628808 is about 19865.2663712320. The cubic root of 394628808 is about 733.4934869680.

The spelling of 394628808 in words is "three hundred ninety-four million, six hundred twenty-eight thousand, eight hundred eight".