398306 has 4 divisors (see below), whose sum is σ = 597462. Its totient is φ = 199152.

The previous prime is 398303. The next prime is 398311. The reversal of 398306 is 603893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 292681 + 105625 = 541^2 + 325^2 .

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (398303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99575 + ... + 99578.

2³⁹⁸³⁰⁶ is an apocalyptic number.

398306 is a deficient number, since it is larger than the sum of its proper divisors (199156).

398306 is a wasteful number, since it uses less digits than its factorization.

398306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199155.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 398306 is about 631.1148865302. The cubic root of 398306 is about 73.5764703061.

The spelling of 398306 in words is "three hundred ninety-eight thousand, three hundred six".