987784 has 32 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 408960.

The previous prime is 987739. The next prime is 987793. The reversal of 987784 is 487789.

It is a self number, because there is not a number n which added to its sum of digits gives 987784.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1452 + ... + 2020.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁹⁸⁷⁷⁸⁴ 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 987784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094400).

987784 is an abundant number, since it is smaller than the sum of its proper divisors (1201016).

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

987784 is a wasteful number, since it uses less digits than its factorization.

987784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 609 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 987784 is about 993.8732313530. The cubic root of 987784 is about 99.5911305360.

It can be divided in two parts, 987 and 784, that added together give a palindrome (1771).

The spelling of 987784 in words is "nine hundred eighty-seven thousand, seven hundred eighty-four".