998580 has 96 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 225280.

The previous prime is 998561. The next prime is 998617. The reversal of 998580 is 85899.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998580.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11176 + ... + 11264.

It is an arithmetic number, because the mean of its divisors is an integer number (34020).

2⁹⁹⁸⁵⁸⁰ 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 998580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632960).

998580 is an abundant number, since it is smaller than the sum of its proper divisors (2267340).

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

998580 is a wasteful number, since it uses less digits than its factorization.

998580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 998580 is about 999.2897477709. The cubic root of 998580 is about 99.9526442445.

It can be divided in two parts, 9 and 98580, that added together give a palindrome (98589).

The spelling of 998580 in words is "nine hundred ninety-eight thousand, five hundred eighty".