987876636 has 12 divisors (see below), whose sum is σ = 2305045512. Its totient is φ = 329292208.

The previous prime is 987876607. The next prime is 987876649. The reversal of 987876636 is 636678789.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 987876636.

It is a congruent number.

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, 41161515 + ... + 41161538.

It is an arithmetic number, because the mean of its divisors is an integer number (192087126).

Almost surely, 2^987876636 is an apocalyptic number.

It is an amenable number.

987876636 is an abundant number, since it is smaller than the sum of its proper divisors (1317168876).

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

987876636 is a wasteful number, since it uses less digits than its factorization.

987876636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82323060 (or 82323058 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 60.

The square root of 987876636 is about 31430.5048639057. The cubic root of 987876636 is about 995.9424371178.

The spelling of 987876636 in words is "nine hundred eighty-seven million, eight hundred seventy-six thousand, six hundred thirty-six".