394581164 has 12 divisors (see below), whose sum is σ = 690898824. Its totient is φ = 197181504.

The previous prime is 394581139. The next prime is 394581167. The reversal of 394581164 is 461185493.

It is not an unprimeable number, because it can be changed into a prime (394581167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18842 + ... + 33825.

It is an arithmetic number, because the mean of its divisors is an integer number (57574902).

Almost surely, 2^394581164 is an apocalyptic number.

It is an amenable number.

394581164 is a deficient number, since it is larger than the sum of its proper divisors (296317660).

394581164 is a wasteful number, since it uses less digits than its factorization.

394581164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54544 (or 54542 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 394581164 is about 19864.0671565518. The cubic root of 394581164 is about 733.4639672696.

The spelling of 394581164 in words is "three hundred ninety-four million, five hundred eighty-one thousand, one hundred sixty-four".