398844 has 30 divisors (see below), whose sum is σ = 1043504. Its totient is φ = 132840.

The previous prime is 398833. The next prime is 398857. The reversal of 398844 is 448893.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 398799 and 398808.

It is a congruent number.

It is an unprimeable number.

398844 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 9 ways as a sum of consecutive naturals, for example, 292 + ... + 939.

2³⁹⁸⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

398844 is an abundant number, since it is smaller than the sum of its proper divisors (644660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398844 is a wasteful number, since it uses less digits than its factorization.

398844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1236 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 398844 is about 631.5409725426. The cubic root of 398844 is about 73.6095824795.

The spelling of 398844 in words is "three hundred ninety-eight thousand, eight hundred forty-four".