987812 has 12 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 423336.

The previous prime is 987809. The next prime is 987821. The reversal of 987812 is 218789.

It is a happy number.

987812 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987812.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17612 + ... + 17667.

It is an arithmetic number, because the mean of its divisors is an integer number (164640).

2⁹⁸⁷⁸¹² is an apocalyptic number.

It is an amenable number.

987812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

987812 is a wasteful number, since it uses less digits than its factorization.

987812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35290 (or 35288 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 987812 is about 993.8873175567. The cubic root of 987812 is about 99.5920715398.

The spelling of 987812 in words is "nine hundred eighty-seven thousand, eight hundred twelve".