398242 has 24 divisors (see below), whose sum is σ = 696276. Its totient is φ = 169728.

The previous prime is 398227. The next prime is 398249. The reversal of 398242 is 242893.

It can be written as a sum of positive squares in 6 ways, for example, as 281961 + 116281 = 531^2 + 341^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 398242.

It is not an unprimeable number, because it can be changed into a prime (398249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7488 + ... + 7540.

2³⁹⁸²⁴² is an apocalyptic number.

398242 is a deficient number, since it is larger than the sum of its proper divisors (298034).

398242 is a wasteful number, since it uses less digits than its factorization.

398242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 85 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 398242 is about 631.0641805712. The cubic root of 398242 is about 73.5725293274.

It can be divided in two parts, 39 and 8242, that added together give a square (8281 = 91²).

The spelling of 398242 in words is "three hundred ninety-eight thousand, two hundred forty-two".