87523218 has 48 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 27887328.

The previous prime is 87523217. The next prime is 87523229. The reversal of 87523218 is 81232578.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87523213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55071 + ... + 56637.

It is an arithmetic number, because the mean of its divisors is an integer number (4127760).

Almost surely, 2^87523218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87523218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

87523218 is an abundant number, since it is smaller than the sum of its proper divisors (110609262).

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

87523218 is a wasteful number, since it uses less digits than its factorization.

87523218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711 (or 1708 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 87523218 is about 9355.3844389207. The cubic root of 87523218 is about 443.9912647417.

The spelling of 87523218 in words is "eighty-seven million, five hundred twenty-three thousand, two hundred eighteen".