398994 has 8 divisors (see below), whose sum is σ = 798000. Its totient is φ = 132996.

The previous prime is 398989. The next prime is 399023. The reversal of 398994 is 499893.

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

398994 is an admirable number.

It is an unprimeable number.

398994 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 in 3 ways as a sum of consecutive naturals, for example, 33244 + ... + 33255.

It is an arithmetic number, because the mean of its divisors is an integer number (99750).

2³⁹⁸⁹⁹⁴ is an apocalyptic number.

398994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

398994 is a wasteful number, since it uses less digits than its factorization.

398994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66504.

The product of its digits is 69984, while the sum is 42.

The square root of 398994 is about 631.6597185194. The cubic root of 398994 is about 73.6188091893.

It can be divided in two parts, 39899 and 4, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 398994 in words is "three hundred ninety-eight thousand, nine hundred ninety-four".