87116220 has 72 divisors (see below), whose sum is σ = 266653296. Its totient is φ = 23020032.

The previous prime is 87116207. The next prime is 87116233. The reversal of 87116220 is 2261178.

It is an interprime number because it is at equal distance from previous prime (87116207) and next prime (87116233).

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 23 ways as a sum of consecutive naturals, for example, 18199 + ... + 22481.

It is an arithmetic number, because the mean of its divisors is an integer number (3703518).

Almost surely, 2^87116220 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 87116220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133326648).

87116220 is an abundant number, since it is smaller than the sum of its proper divisors (179537076).

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

87116220 is a wasteful number, since it uses less digits than its factorization.

87116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411 (or 4406 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 87116220 is about 9333.6070197968. The cubic root of 87116220 is about 443.3019833234.

Adding to 87116220 its reverse (2261178), we get a palindrome (89377398).

The spelling of 87116220 in words is "eighty-seven million, one hundred sixteen thousand, two hundred twenty".