853220 has 24 divisors (see below), whose sum is σ = 1841784. Its totient is φ = 331776.

The previous prime is 853217. The next prime is 853241. The reversal of 853220 is 22358.

It can be written as a sum of positive squares in 4 ways, for example, as 357604 + 495616 = 598^2 + 704^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 853192 and 853201.

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, 164 + ... + 1316.

It is an arithmetic number, because the mean of its divisors is an integer number (76741).

2⁸⁵³²²⁰ 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 853220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920892).

853220 is an abundant number, since it is smaller than the sum of its proper divisors (988564).

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

853220 is a wasteful number, since it uses less digits than its factorization.

853220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 853220 is about 923.6990852004. The cubic root of 853220 is about 94.8462888237.

Adding to 853220 its reverse (22358), we get a palindrome (875578).

The spelling of 853220 in words is "eight hundred fifty-three thousand, two hundred twenty".