811860 has 48 divisors (see below), whose sum is σ = 2599296. Its totient is φ = 185472.

The previous prime is 811819. The next prime is 811861. The reversal of 811860 is 68118.

It is a self number, because there is not a number n which added to its sum of digits gives 811860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811861) by changing a digit.

811860 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, 547 + ... + 1386.

It is an arithmetic number, because the mean of its divisors is an integer number (54152).

2⁸¹¹⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

811860 is an abundant number, since it is smaller than the sum of its proper divisors (1787436).

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

811860 is a wasteful number, since it uses less digits than its factorization.

811860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 811860 is about 901.0327408036. The cubic root of 811860 is about 93.2882718986.

Adding to 811860 its reverse (68118), we get a palindrome (879978).

The spelling of 811860 in words is "eight hundred eleven thousand, eight hundred sixty".