987844 has 36 divisors (see below), whose sum is σ = 2059372. Its totient is φ = 411840.

The previous prime is 987821. The next prime is 987851. The reversal of 987844 is 448789.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 774400 = 462^2 + 880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 987797 and 987806.

It is an unprimeable number.

987844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6214 + ... + 6370.

2⁹⁸⁷⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

987844 is an abundant number, since it is smaller than the sum of its proper divisors (1071528).

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

987844 is a wasteful number, since it uses less digits than its factorization.

987844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 183 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 987844 is about 993.9034158307. The cubic root of 987844 is about 99.5931469508.

The spelling of 987844 in words is "nine hundred eighty-seven thousand, eight hundred forty-four".