998442 has 12 divisors (see below), whose sum is σ = 2163330. Its totient is φ = 332808.

The previous prime is 998429. The next prime is 998443. The reversal of 998442 is 244899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 998001 + 441 = 999^2 + 21^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998397 and 998406.

It is not an unprimeable number, because it can be changed into a prime (998443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27717 + ... + 27752.

2⁹⁹⁸⁴⁴² is an apocalyptic number.

998442 is an abundant number, since it is smaller than the sum of its proper divisors (1164888).

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

998442 is a wasteful number, since it uses less digits than its factorization.

998442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55477 (or 55474 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 998442 is about 999.2206963429. The cubic root of 998442 is about 99.9480396726.

The spelling of 998442 in words is "nine hundred ninety-eight thousand, four hundred forty-two".