394716660 has 48 divisors (see below), whose sum is σ = 1190224896. Its totient is φ = 97160832.

The previous prime is 394716643. The next prime is 394716689. The reversal of 394716660 is 66617493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252244 + ... + 253803.

It is an arithmetic number, because the mean of its divisors is an integer number (24796352).

Almost surely, 2^394716660 is an apocalyptic number.

394716660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394716660 is an abundant number, since it is smaller than the sum of its proper divisors (795508236).

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

394716660 is a wasteful number, since it uses less digits than its factorization.

394716660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506072 (or 506070 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 394716660 is about 19867.4774443058. The cubic root of 394716660 is about 733.5479128718.

The spelling of 394716660 in words is "three hundred ninety-four million, seven hundred sixteen thousand, six hundred sixty".