987904 has 36 divisors (see below), whose sum is σ = 2097144. Its totient is φ = 462848.

The previous prime is 987869. The next prime is 987911. The reversal of 987904 is 409789.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4239 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (58254).

2⁹⁸⁷⁹⁰⁴ 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 987904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048572).

987904 is an abundant number, since it is smaller than the sum of its proper divisors (1109240).

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

987904 is a wasteful number, since it uses less digits than its factorization.

987904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 987904 is about 993.9335993918. The cubic root of 987904 is about 99.5951632840.

It can be divided in two parts, 987 and 904, that added together give a triangular number (1891 = T₆₁).

The spelling of 987904 in words is "nine hundred eighty-seven thousand, nine hundred four".