998860 has 12 divisors (see below), whose sum is σ = 2097648. Its totient is φ = 399536.

The previous prime is 998857. The next prime is 998861. The reversal of 998860 is 68899.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998861) 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, 24952 + ... + 24991.

It is an arithmetic number, because the mean of its divisors is an integer number (174804).

2⁹⁹⁸⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

998860 is an abundant number, since it is smaller than the sum of its proper divisors (1098788).

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

998860 is a wasteful number, since it uses less digits than its factorization.

998860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49952 (or 49950 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 998860 is about 999.4298374573. The cubic root of 998860 is about 99.9619855508.

The spelling of 998860 in words is "nine hundred ninety-eight thousand, eight hundred sixty".