87020 has 24 divisors (see below), whose sum is σ = 193200. Its totient is φ = 32832.

The previous prime is 87013. The next prime is 87037. The reversal of 87020 is 2078.

87020 = T₂₁ + T₂₂ + ... + T₈₀.

It is a self number, because there is not a number n which added to its sum of digits gives 87020.

It is a congruent number.

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, 266 + ... + 494.

It is an arithmetic number, because the mean of its divisors is an integer number (8050).

2⁸⁷⁰²⁰ 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 87020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96600).

87020 is an abundant number, since it is smaller than the sum of its proper divisors (106180).

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

87020 is a wasteful number, since it uses less digits than its factorization.

87020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 87020 is about 294.9915253020. The cubic root of 87020 is about 44.3138713956.

Adding to 87020 its reverse (2078), we get a palindrome (89098).

The spelling of 87020 in words is "eighty-seven thousand, twenty".