998922 has 8 divisors (see below), whose sum is σ = 1997856. Its totient is φ = 332972.

The previous prime is 998917. The next prime is 998927. The reversal of 998922 is 229899.

It is an interprime number because it is at equal distance from previous prime (998917) and next prime (998927).

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

998922 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (998927) 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 3 ways as a sum of consecutive naturals, for example, 83238 + ... + 83249.

It is an arithmetic number, because the mean of its divisors is an integer number (249732).

2⁹⁹⁸⁹²² is an apocalyptic number.

998922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

998922 is a wasteful number, since it uses less digits than its factorization.

998922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166492.

The product of its digits is 23328, while the sum is 39.

The square root of 998922 is about 999.4608546612. The cubic root of 998922 is about 99.9640537469.

It can be divided in two parts, 9989 and 22, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 998922 in words is "nine hundred ninety-eight thousand, nine hundred twenty-two".