987885 has 24 divisors (see below), whose sum is σ = 1773720. Its totient is φ = 508032.

The previous prime is 987869. The next prime is 987911. The reversal of 987885 is 588789.

It can be written as a sum of positive squares in 4 ways, for example, as 145161 + 842724 = 381^2 + 918^2 .

It is not a de Polignac number, because 987885 - 2⁴ = 987869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 987885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 927 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (73905).

2⁹⁸⁷⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

987885 is a deficient number, since it is larger than the sum of its proper divisors (785835).

987885 is a wasteful number, since it uses less digits than its factorization.

987885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 794 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 987885 is about 993.9240413633. The cubic root of 987885 is about 99.5945247873.

The spelling of 987885 in words is "nine hundred eighty-seven thousand, eight hundred eighty-five".