987836 has 24 divisors (see below), whose sum is σ = 1864800. Its totient is φ = 456192.

The previous prime is 987821. The next prime is 987851. The reversal of 987836 is 638789.

It is an interprime number because it is at equal distance from previous prime (987821) and next prime (987851).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

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

It is a junction number, because it is equal to n+sod(n) for n = 987793 and 987802.

It is a congruent number.

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, 4865 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (77700).

2⁹⁸⁷⁸³⁶ is an apocalyptic number.

It is an amenable number.

987836 is a deficient number, since it is larger than the sum of its proper divisors (876964).

987836 is a wasteful number, since it uses less digits than its factorization.

987836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 291 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 987836 is about 993.8993912867. The cubic root of 987836 is about 99.5928781002.

It can be divided in two parts, 98783 and 6, that added together give a palindrome (98789).

The spelling of 987836 in words is "nine hundred eighty-seven thousand, eight hundred thirty-six".