8210020 has 72 divisors (see below), whose sum is σ = 21397824. Its totient is φ = 2590848.

The previous prime is 8210017. The next prime is 8210053. The reversal of 8210020 is 200128.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23487 + ... + 23833.

It is an arithmetic number, because the mean of its divisors is an integer number (297192).

Almost surely, 2^8210020 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 8210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10698912).

8210020 is an abundant number, since it is smaller than the sum of its proper divisors (13187804).

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

8210020 is a wasteful number, since it uses less digits than its factorization.

8210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 8210020 is about 2865.3132464008. The cubic root of 8210020 is about 201.7350707854.

Adding to 8210020 its reverse (200128), we get a palindrome (8410148).

The spelling of 8210020 in words is "eight million, two hundred ten thousand, twenty".