87118728 has 16 divisors (see below), whose sum is σ = 217796880. Its totient is φ = 29039568.

The previous prime is 87118663. The next prime is 87118747. The reversal of 87118728 is 82781178.

It is a self number, because there is not a number n which added to its sum of digits gives 87118728.

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 3 ways as a sum of consecutive naturals, for example, 1814950 + ... + 1814997.

It is an arithmetic number, because the mean of its divisors is an integer number (13612305).

Almost surely, 2^87118728 is an apocalyptic number.

It is an amenable number.

87118728 is an abundant number, since it is smaller than the sum of its proper divisors (130678152).

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

87118728 is a wasteful number, since it uses less digits than its factorization.

87118728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629956 (or 3629952 counting only the distinct ones).

The product of its digits is 50176, while the sum is 42.

The square root of 87118728 is about 9333.7413720330. The cubic root of 87118728 is about 443.3062373751.

The spelling of 87118728 in words is "eighty-seven million, one hundred eighteen thousand, seven hundred twenty-eight".