87159918 has 32 divisors (see below), whose sum is σ = 185829120. Its totient is φ = 27158400.

The previous prime is 87159893. The next prime is 87159923. The reversal of 87159918 is 81995178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12573 + ... + 18231.

It is an arithmetic number, because the mean of its divisors is an integer number (5807160).

Almost surely, 2^87159918 is an apocalyptic number.

87159918 is an abundant number, since it is smaller than the sum of its proper divisors (98669202).

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

87159918 is a wasteful number, since it uses less digits than its factorization.

87159918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832.

The product of its digits is 181440, while the sum is 48.

The square root of 87159918 is about 9335.9476219610. The cubic root of 87159918 is about 443.3760918803.

The spelling of 87159918 in words is "eighty-seven million, one hundred fifty-nine thousand, nine hundred eighteen".