87135210 has 64 divisors (see below), whose sum is σ = 233775360. Its totient is φ = 23094720.

The previous prime is 87135161. The next prime is 87135229. The reversal of 87135210 is 1253178.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47979 + ... + 49761.

It is an arithmetic number, because the mean of its divisors is an integer number (3652740).

Almost surely, 2^87135210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87135210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116887680).

87135210 is an abundant number, since it is smaller than the sum of its proper divisors (146640150).

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

87135210 is a wasteful number, since it uses less digits than its factorization.

87135210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1974 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 87135210 is about 9334.6242559623. The cubic root of 87135210 is about 443.3341919946.

Adding to 87135210 its reverse (1253178), we get a palindrome (88388388).

The spelling of 87135210 in words is "eighty-seven million, one hundred thirty-five thousand, two hundred ten".