998842 has 16 divisors (see below), whose sum is σ = 1654632. Its totient is φ = 449280.

The previous prime is 998839. The next prime is 998843. The reversal of 998842 is 248899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 168921 + 829921 = 411^2 + 911^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998795 and 998804.

It is not an unprimeable number, because it can be changed into a prime (998843) 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, 598 + ... + 1534.

2⁹⁹⁸⁸⁴² is an apocalyptic number.

998842 is a deficient number, since it is larger than the sum of its proper divisors (655790).

998842 is a wasteful number, since it uses less digits than its factorization.

998842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 41472, while the sum is 40.

The square root of 998842 is about 999.4208322824. The cubic root of 998842 is about 99.9613850908.

The spelling of 998842 in words is "nine hundred ninety-eight thousand, eight hundred forty-two".