998238 has 16 divisors (see below), whose sum is σ = 2065680. Its totient is φ = 321216.

The previous prime is 998237. The next prime is 998243. The reversal of 998238 is 832899.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 998196 and 998205.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998238.

It is not an unprimeable number, because it can be changed into a prime (998237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2695 + ... + 3042.

It is an arithmetic number, because the mean of its divisors is an integer number (129105).

2⁹⁹⁸²³⁸ is an apocalyptic number.

998238 is an abundant number, since it is smaller than the sum of its proper divisors (1067442).

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

998238 is a wasteful number, since it uses less digits than its factorization.

998238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771.

The product of its digits is 31104, while the sum is 39.

The square root of 998238 is about 999.1186115772. The cubic root of 998238 is about 99.9412321368.

The spelling of 998238 in words is "nine hundred ninety-eight thousand, two hundred thirty-eight".