987828 has 24 divisors (see below), whose sum is σ = 2321088. Its totient is φ = 326976.

The previous prime is 987821. The next prime is 987851. The reversal of 987828 is 828789.

It is a happy number.

987828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 987828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987821) 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, 3000 + ... + 3312.

It is an arithmetic number, because the mean of its divisors is an integer number (96712).

2⁹⁸⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

987828 is an abundant number, since it is smaller than the sum of its proper divisors (1333260).

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

987828 is a wasteful number, since it uses less digits than its factorization.

987828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 581 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 987828 is about 993.8953667263. The cubic root of 987828 is about 99.5926092482.

It can be divided in two parts, 98782 and 8, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 987828 in words is "nine hundred eighty-seven thousand, eight hundred twenty-eight".