998942 has 8 divisors (see below), whose sum is σ = 1712496. Its totient is φ = 428112.

The previous prime is 998941. The next prime is 998947. The reversal of 998942 is 249899.

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

It is an Ulam number.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 998942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35663 + ... + 35690.

It is an arithmetic number, because the mean of its divisors is an integer number (214062).

2⁹⁹⁸⁹⁴² is an apocalyptic number.

998942 is a deficient number, since it is larger than the sum of its proper divisors (713554).

998942 is a wasteful number, since it uses less digits than its factorization.

998942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71362.

The product of its digits is 46656, while the sum is 41.

The square root of 998942 is about 999.4708600054. The cubic root of 998942 is about 99.9647208886.

The spelling of 998942 in words is "nine hundred ninety-eight thousand, nine hundred forty-two".