394066 has 4 divisors (see below), whose sum is σ = 591102. Its totient is φ = 197032.

The previous prime is 394063. The next prime is 394073. The reversal of 394066 is 660493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 172225 = 471^2 + 415^2 .

It is not an unprimeable number, because it can be changed into a prime (394063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98515 + ... + 98518.

2³⁹⁴⁰⁶⁶ is an apocalyptic number.

394066 is a deficient number, since it is larger than the sum of its proper divisors (197036).

394066 is a wasteful number, since it uses less digits than its factorization.

394066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197035.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 394066 is about 627.7467642290. The cubic root of 394066 is about 73.3144625457.

The spelling of 394066 in words is "three hundred ninety-four thousand, sixty-six".