398168506 has 16 divisors (see below), whose sum is σ = 602548128. Its totient is φ = 197326800.

The previous prime is 398168501. The next prime is 398168527. The reversal of 398168506 is 605861893.

It is not an unprimeable number, because it can be changed into a prime (398168501) 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, 118161 + ... + 121483.

It is an arithmetic number, because the mean of its divisors is an integer number (37659258).

Almost surely, 2^398168506 is an apocalyptic number.

398168506 is a deficient number, since it is larger than the sum of its proper divisors (204379622).

398168506 is a wasteful number, since it uses less digits than its factorization.

398168506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 398168506 is about 19954.1601176296. The cubic root of 398168506 is about 735.6800320837.

The spelling of 398168506 in words is "three hundred ninety-eight million, one hundred sixty-eight thousand, five hundred six".