87213858 has 16 divisors (see below), whose sum is σ = 178139520. Its totient is φ = 28452656.

The previous prime is 87213851. The next prime is 87213869. The reversal of 87213858 is 85831278.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87213851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154353 + ... + 154916.

It is an arithmetic number, because the mean of its divisors is an integer number (11133720).

Almost surely, 2^87213858 is an apocalyptic number.

87213858 is an abundant number, since it is smaller than the sum of its proper divisors (90925662).

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

87213858 is a wasteful number, since it uses less digits than its factorization.

87213858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309321.

The product of its digits is 107520, while the sum is 42.

The square root of 87213858 is about 9338.8360088396. The cubic root of 87213858 is about 443.4675359566.

The spelling of 87213858 in words is "eighty-seven million, two hundred thirteen thousand, eight hundred fifty-eight".