820086 has 16 divisors (see below), whose sum is σ = 1657344. Its totient is φ = 270504.

The previous prime is 820073. The next prime is 820093. The reversal of 820086 is 680028.

820086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

820086 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 1281.

It is an arithmetic number, because the mean of its divisors is an integer number (103584).

2⁸²⁰⁰⁸⁶ is an apocalyptic number.

820086 is an abundant number, since it is smaller than the sum of its proper divisors (837258).

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

820086 is a wasteful number, since it uses less digits than its factorization.

820086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 820086 is about 905.5859981250. The cubic root of 820086 is about 93.6022882778.

The spelling of 820086 in words is "eight hundred twenty thousand, eighty-six".