998810 has 8 divisors (see below), whose sum is σ = 1797876. Its totient is φ = 399520.

The previous prime is 998779. The next prime is 998813. The reversal of 998810 is 18899.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 908209 + 90601 = 953^2 + 301^2 .

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

It is a super-2 number, since 2×998810² = 1995242832200, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998813) 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, 49931 + ... + 49950.

2⁹⁹⁸⁸¹⁰ is an apocalyptic number.

998810 is a deficient number, since it is larger than the sum of its proper divisors (799066).

998810 is a wasteful number, since it uses less digits than its factorization.

998810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99888.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 998810 is about 999.4048228821. The cubic root of 998810 is about 99.9603175885.

The spelling of 998810 in words is "nine hundred ninety-eight thousand, eight hundred ten".