850020 has 48 divisors (see below), whose sum is σ = 2462208. Its totient is φ = 218880.

The previous prime is 850009. The next prime is 850021. The reversal of 850020 is 20058.

850020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (850021) by changing a digit.

850020 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 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (51296).

2⁸⁵⁰⁰²⁰ 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 850020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231104).

850020 is an abundant number, since it is smaller than the sum of its proper divisors (1612188).

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

850020 is a wasteful number, since it uses less digits than its factorization.

850020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 850020 is about 921.9652921884. The cubic root of 850020 is about 94.7275666682.

Adding to 850020 its reverse (20058), we get a palindrome (870078).

The spelling of 850020 in words is "eight hundred fifty thousand, twenty".