398506 has 8 divisors (see below), whose sum is σ = 629280. Its totient is φ = 188748.

The previous prime is 398491. The next prime is 398509. The reversal of 398506 is 605893.

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 (398509) 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, 5206 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (78660).

2³⁹⁸⁵⁰⁶ is an apocalyptic number.

398506 is a deficient number, since it is larger than the sum of its proper divisors (230774).

398506 is a wasteful number, since it uses less digits than its factorization.

398506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 398506 is about 631.2733164011. The cubic root of 398506 is about 73.5887831441.

The spelling of 398506 in words is "three hundred ninety-eight thousand, five hundred six".