394222394 has 8 divisors (see below), whose sum is σ = 591915828. Its totient is φ = 196917120.

The previous prime is 394222391. The next prime is 394222399. The reversal of 394222394 is 493222493.

It can be written as a sum of positive squares in 2 ways, for example, as 394221025 + 1369 = 19855^2 + 37^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×394222394² = 310822591862182472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394222391) 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, 94487 + ... + 98570.

Almost surely, 2^394222394 is an apocalyptic number.

394222394 is a deficient number, since it is larger than the sum of its proper divisors (197693434).

394222394 is a wasteful number, since it uses less digits than its factorization.

394222394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194080.

The product of its digits is 93312, while the sum is 38.

The square root of 394222394 is about 19855.0344749134. The cubic root of 394222394 is about 733.2416009683.

Subtracting 394222394 from its reverse (493222493), we obtain a palindrome (99000099).

The spelling of 394222394 in words is "three hundred ninety-four million, two hundred twenty-two thousand, three hundred ninety-four".