398206 has 4 divisors (see below), whose sum is σ = 597312. Its totient is φ = 199102.

The previous prime is 398171. The next prime is 398207. The reversal of 398206 is 602893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602893 = 337 ⋅1789.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99550 + ... + 99553.

It is an arithmetic number, because the mean of its divisors is an integer number (149328).

2³⁹⁸²⁰⁶ is an apocalyptic number.

398206 is a deficient number, since it is larger than the sum of its proper divisors (199106).

398206 is a wasteful number, since it uses less digits than its factorization.

398206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199105.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 398206 is about 631.0356566788. The cubic root of 398206 is about 73.5703123414.

The spelling of 398206 in words is "three hundred ninety-eight thousand, two hundred six".