998830 has 32 divisors (see below), whose sum is σ = 2165760. Its totient is φ = 324000.

The previous prime is 998819. The next prime is 998831. The reversal of 998830 is 38899.

It is a super-2 number, since 2×998830² = 1995322737800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 998830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (67680).

2⁹⁹⁸⁸³⁰ is an apocalyptic number.

998830 is an abundant number, since it is smaller than the sum of its proper divisors (1166930).

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

998830 is a wasteful number, since it uses less digits than its factorization.

998830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 998830 is about 999.4148287873. The cubic root of 998830 is about 99.9609847801.

The spelling of 998830 in words is "nine hundred ninety-eight thousand, eight hundred thirty".