393828394 has 8 divisors (see below), whose sum is σ = 591437700. Its totient is φ = 196682496.

The previous prime is 393828361. The next prime is 393828403. The reversal of 393828394 is 493828393.

It can be written as a sum of positive squares in 2 ways, for example, as 361190025 + 32638369 = 19005^2 + 5713^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113719 + ... + 117130.

Almost surely, 2^393828394 is an apocalyptic number.

393828394 is a deficient number, since it is larger than the sum of its proper divisors (197609306).

393828394 is a wasteful number, since it uses less digits than its factorization.

393828394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231704.

The product of its digits is 1119744, while the sum is 49.

The square root of 393828394 is about 19845.1100778000. The cubic root of 393828394 is about 732.9972435587.

Subtracting 393828394 from its reverse (493828393), we obtain a palindrome (99999999).

The spelling of 393828394 in words is "three hundred ninety-three million, eight hundred twenty-eight thousand, three hundred ninety-four".