998560 has 36 divisors (see below), whose sum is σ = 2389338. Its totient is φ = 394368.

The previous prime is 998551. The next prime is 998561. The reversal of 998560 is 65899.

998560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 99856 = 948^2 + 316^2 .

It is not an unprimeable number, because it can be changed into a prime (998561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12601 + ... + 12679.

2⁹⁹⁸⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194669).

998560 is an abundant number, since it is smaller than the sum of its proper divisors (1390778).

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

998560 is an equidigital number, since it uses as much as digits as its factorization.

998560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 998560 is about 999.2797406132. The cubic root of 998560 is about 99.9519769416.

The spelling of 998560 in words is "nine hundred ninety-eight thousand, five hundred sixty".