1998584 has 32 divisors (see below), whose sum is σ = 4341600. Its totient is φ = 844800.

The previous prime is 1998569. The next prime is 1998587. The reversal of 1998584 is 4858991.

1998584 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4784 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (135675).

2^1998584 is an apocalyptic number.

1998584 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2170800).

1998584 is an abundant number, since it is smaller than the sum of its proper divisors (2343016).

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

1998584 is a wasteful number, since it uses less digits than its factorization.

1998584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 499 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 1998584 is about 1413.7128421288. The cubic root of 1998584 is about 125.9623638327.

The spelling of 1998584 in words is "one million, nine hundred ninety-eight thousand, five hundred eighty-four".