87215808 has 56 divisors (see below), whose sum is σ = 237014512. Its totient is φ = 28283904.

The previous prime is 87215783. The next prime is 87215827. The reversal of 87215808 is 80851278.

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, 966 + ... + 13242.

It is an arithmetic number, because the mean of its divisors is an integer number (4232402).

Almost surely, 2^87215808 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 87215808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118507256).

87215808 is an abundant number, since it is smaller than the sum of its proper divisors (149798704).

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

87215808 is a wasteful number, since it uses less digits than its factorization.

87215808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329 (or 12319 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 87215808 is about 9338.9404109888. The cubic root of 87215808 is about 443.4708410707.

The spelling of 87215808 in words is "eighty-seven million, two hundred fifteen thousand, eight hundred eight".