393898394 has 8 divisors (see below), whose sum is σ = 591714720. Its totient is φ = 196660156.

The previous prime is 393898343. The next prime is 393898397. The reversal of 393898394 is 493898393.

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

It is not an unprimeable number, because it can be changed into a prime (393898397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142814 + ... + 145545.

It is an arithmetic number, because the mean of its divisors is an integer number (73964340).

Almost surely, 2^393898394 is an apocalyptic number.

393898394 is a deficient number, since it is larger than the sum of its proper divisors (197816326).

393898394 is a wasteful number, since it uses less digits than its factorization.

393898394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289044.

The product of its digits is 5038848, while the sum is 56.

The square root of 393898394 is about 19846.8736580853. The cubic root of 393898394 is about 733.0406692133.

Subtracting 393898394 from its reverse (493898393), we obtain a palindrome (99999999).

The spelling of 393898394 in words is "three hundred ninety-three million, eight hundred ninety-eight thousand, three hundred ninety-four".