398829 has 8 divisors (see below), whose sum is σ = 559840. Its totient is φ = 251856.

The previous prime is 398821. The next prime is 398833. The reversal of 398829 is 928893.

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

It is not a de Polignac number, because 398829 - 2³ = 398821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398821) 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 in 7 ways as a sum of consecutive naturals, for example, 3442 + ... + 3555.

It is an arithmetic number, because the mean of its divisors is an integer number (69980).

2³⁹⁸⁸²⁹ is an apocalyptic number.

It is an amenable number.

398829 is a deficient number, since it is larger than the sum of its proper divisors (161011).

398829 is a wasteful number, since it uses less digits than its factorization.

398829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019.

The product of its digits is 31104, while the sum is 39.

The square root of 398829 is about 631.5290967168. The cubic root of 398829 is about 73.6086596813.

The spelling of 398829 in words is "three hundred ninety-eight thousand, eight hundred twenty-nine".