87218576 has 40 divisors (see below), whose sum is σ = 178381440. Its totient is φ = 41229056.

The previous prime is 87218561. The next prime is 87218581. The reversal of 87218576 is 67581278.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31421 + ... + 34083.

It is an arithmetic number, because the mean of its divisors is an integer number (4459536).

Almost surely, 2^87218576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87218576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89190720).

87218576 is an abundant number, since it is smaller than the sum of its proper divisors (91162864).

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

87218576 is a wasteful number, since it uses less digits than its factorization.

87218576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2777 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 87218576 is about 9339.0886064969. The cubic root of 87218576 is about 443.4755325532.

The spelling of 87218576 in words is "eighty-seven million, two hundred eighteen thousand, five hundred seventy-six".