398986 has 8 divisors (see below), whose sum is σ = 684000. Its totient is φ = 170988.

The previous prime is 398977. The next prime is 398989. The reversal of 398986 is 689893.

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

It is not an unprimeable number, because it can be changed into a prime (398989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14236 + ... + 14263.

It is an arithmetic number, because the mean of its divisors is an integer number (85500).

2³⁹⁸⁹⁸⁶ is an apocalyptic number.

398986 is a deficient number, since it is larger than the sum of its proper divisors (285014).

398986 is a wasteful number, since it uses less digits than its factorization.

398986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28508.

The product of its digits is 93312, while the sum is 43.

The square root of 398986 is about 631.6533859642. The cubic root of 398986 is about 73.6183171565.

It can be divided in two parts, 39 and 8986, that added together give a square (9025 = 95²).

The spelling of 398986 in words is "three hundred ninety-eight thousand, nine hundred eighty-six".