811320 has 32 divisors (see below), whose sum is σ = 2434320. Its totient is φ = 216320.

The previous prime is 811297. The next prime is 811337. The reversal of 811320 is 23118.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 811320.

It is a congruent number.

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, 3261 + ... + 3500.

2⁸¹¹³²⁰ is an apocalyptic number.

It is an amenable number.

811320 is an abundant number, since it is smaller than the sum of its proper divisors (1623000).

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

811320 is a wasteful number, since it uses less digits than its factorization.

811320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775 (or 6771 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 811320 is about 900.7330348111. The cubic root of 811320 is about 93.2675840789.

Adding to 811320 its reverse (23118), we get a palindrome (834438).

The spelling of 811320 in words is "eight hundred eleven thousand, three hundred twenty".