394866660 has 24 divisors (see below), whose sum is σ = 1105626816. Its totient is φ = 105297760.

The previous prime is 394866653. The next prime is 394866673. The reversal of 394866660 is 66668493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3290496 + ... + 3290615.

It is an arithmetic number, because the mean of its divisors is an integer number (46067784).

Almost surely, 2^394866660 is an apocalyptic number.

394866660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394866660 is an abundant number, since it is smaller than the sum of its proper divisors (710760156).

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

394866660 is a wasteful number, since it uses less digits than its factorization.

394866660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581123 (or 6581121 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 394866660 is about 19871.2520994526. The cubic root of 394866660 is about 733.6408219236.

The spelling of 394866660 in words is "three hundred ninety-four million, eight hundred sixty-six thousand, six hundred sixty".