987834 has 16 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 323760.

The previous prime is 987821. The next prime is 987851. The reversal of 987834 is 438789.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 987792 and 987801.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987834.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984 + ... + 1715.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2⁹⁸⁷⁸³⁴ is an apocalyptic number.

987834 is an abundant number, since it is smaller than the sum of its proper divisors (1020966).

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

987834 is a wasteful number, since it uses less digits than its factorization.

987834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765.

The product of its digits is 48384, while the sum is 39.

The square root of 987834 is about 993.8983851481. The cubic root of 987834 is about 99.5928108874.

The spelling of 987834 in words is "nine hundred eighty-seven thousand, eight hundred thirty-four".