87871668 has 24 divisors (see below), whose sum is σ = 208903968. Its totient is φ = 28737696.

The previous prime is 87871613. The next prime is 87871687. The reversal of 87871668 is 86617878.

It is a self number, because there is not a number n which added to its sum of digits gives 87871668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68446 + ... + 69717.

It is an arithmetic number, because the mean of its divisors is an integer number (8704332).

Almost surely, 2^87871668 is an apocalyptic number.

It is an amenable number.

87871668 is an abundant number, since it is smaller than the sum of its proper divisors (121032300).

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

87871668 is a wasteful number, since it uses less digits than its factorization.

87871668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138223 (or 138221 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 87871668 is about 9373.9889054767. The cubic root of 87871668 is about 444.5796948836.

The spelling of 87871668 in words is "eighty-seven million, eight hundred seventy-one thousand, six hundred sixty-eight".