394222066 has 16 divisors (see below), whose sum is σ = 678445056. Its totient is φ = 168293376.

The previous prime is 394222063. The next prime is 394222091. The reversal of 394222066 is 660222493.

It is a happy number.

It is a super-2 number, since 2×394222066² = 310822074642616712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394222063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51186 + ... + 58381.

It is an arithmetic number, because the mean of its divisors is an integer number (42402816).

Almost surely, 2^394222066 is an apocalyptic number.

394222066 is a deficient number, since it is larger than the sum of its proper divisors (284222990).

394222066 is a wasteful number, since it uses less digits than its factorization.

394222066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109833.

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

The square root of 394222066 is about 19855.0262150419. The cubic root of 394222066 is about 733.2413976116.

The spelling of 394222066 in words is "three hundred ninety-four million, two hundred twenty-two thousand, sixty-six".