398828 has 6 divisors (see below), whose sum is σ = 697956. Its totient is φ = 199412.

The previous prime is 398821. The next prime is 398833. The reversal of 398828 is 828893.

398828 is nontrivially palindromic in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 398791 and 398800.

It is not an unprimeable number, because it can be changed into a prime (398821) by changing a digit.

398828 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, 49850 + ... + 49857.

It is an arithmetic number, because the mean of its divisors is an integer number (116326).

2³⁹⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

398828 is a deficient number, since it is larger than the sum of its proper divisors (299128).

398828 is a wasteful number, since it uses less digits than its factorization.

398828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99711 (or 99709 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 398828 is about 631.5283049872. The cubic root of 398828 is about 73.6085981606.

The spelling of 398828 in words is "three hundred ninety-eight thousand, eight hundred twenty-eight".