394340164 has 9 divisors (see below), whose sum is σ = 690164797. Its totient is φ = 197150224.

The previous prime is 394340161. The next prime is 394340171. The reversal of 394340164 is 461043493.

The square root of 394340164 is 19858.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 81757764 + 312582400 = 9042^2 + 17680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394340161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34752 + ... + 44680.

Almost surely, 2^394340164 is an apocalyptic number.

394340164 is the 19858-th square number.

It is an amenable number.

394340164 is a deficient number, since it is larger than the sum of its proper divisors (295824633).

394340164 is an frugal number, since it uses more digits than its factorization.

394340164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19862 (or 9931 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The cubic root of 394340164 is about 733.3146098985.

The spelling of 394340164 in words is "three hundred ninety-four million, three hundred forty thousand, one hundred sixty-four".