1987584 has 44 divisors (see below), whose sum is σ = 5305824. Its totient is φ = 661504.

The previous prime is 1987577. The next prime is 1987619. The reversal of 1987584 is 4857891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749 + ... + 3395.

2^1987584 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 1987584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2652912).

1987584 is an abundant number, since it is smaller than the sum of its proper divisors (3318240).

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

1987584 is an equidigital number, since it uses as much as digits as its factorization.

1987584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 652 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 1987584 is about 1409.8170094023. The cubic root of 1987584 is about 125.7308439425.

The spelling of 1987584 in words is "one million, nine hundred eighty-seven thousand, five hundred eighty-four".