987798 has 32 divisors (see below), whose sum is σ = 2338560. Its totient is φ = 272160.

The previous prime is 987797. The next prime is 987803. The reversal of 987798 is 897789.

987798 is digitally balanced in base 2, 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 (987793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2⁹⁸⁷⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169280).

987798 is an abundant number, since it is smaller than the sum of its proper divisors (1350762).

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

987798 is a wasteful number, since it uses less digits than its factorization.

987798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its digits is 254016, while the sum is 48.

The square root of 987798 is about 993.8802744798. The cubic root of 987798 is about 99.5916010401.

Subtracting from 987798 its reverse (897789), we obtain a palindrome (90009).

The spelling of 987798 in words is "nine hundred eighty-seven thousand, seven hundred ninety-eight".