398806 has 4 divisors (see below), whose sum is σ = 598212. Its totient is φ = 199402.

The previous prime is 398771. The next prime is 398813. The reversal of 398806 is 608893.

398806 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

398806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99700 + ... + 99703.

It is an arithmetic number, because the mean of its divisors is an integer number (149553).

2³⁹⁸⁸⁰⁶ is an apocalyptic number.

398806 is a deficient number, since it is larger than the sum of its proper divisors (199406).

398806 is a wasteful number, since it uses less digits than its factorization.

398806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199405.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 398806 is about 631.5108866837. The cubic root of 398806 is about 73.6072446791.

The spelling of 398806 in words is "three hundred ninety-eight thousand, eight hundred six".