835820 has 36 divisors (see below), whose sum is σ = 1858080. Its totient is φ = 315744.

The previous prime is 835819. The next prime is 835823. The reversal of 835820 is 28538.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 835820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (835823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10541 + ... + 10619.

2⁸³⁵⁸²⁰ 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 835820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929040).

835820 is an abundant number, since it is smaller than the sum of its proper divisors (1022260).

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

835820 is a wasteful number, since it uses less digits than its factorization.

835820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 835820 is about 914.2319180602. The cubic root of 835820 is about 94.1971116566.

The spelling of 835820 in words is "eight hundred thirty-five thousand, eight hundred twenty".