398830 has 8 divisors (see below), whose sum is σ = 717912. Its totient is φ = 159528.

The previous prime is 398821. The next prime is 398833. The reversal of 398830 is 38893.

398830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 398792 and 398801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398833) by changing a digit.

398830 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 19932 + ... + 19951.

It is an arithmetic number, because the mean of its divisors is an integer number (89739).

2³⁹⁸⁸³⁰ is an apocalyptic number.

398830 is a deficient number, since it is larger than the sum of its proper divisors (319082).

398830 is a wasteful number, since it uses less digits than its factorization.

398830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39890.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 398830 is about 631.5298884455. The cubic root of 398830 is about 73.6087212019.

The spelling of 398830 in words is "three hundred ninety-eight thousand, eight hundred thirty".