811128 has 16 divisors (see below), whose sum is σ = 2027880. Its totient is φ = 270368.

The previous prime is 811127. The next prime is 811147. The reversal of 811128 is 821118.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16875 + ... + 16922.

2⁸¹¹¹²⁸ is an apocalyptic number.

It is an amenable number.

811128 is an abundant number, since it is smaller than the sum of its proper divisors (1216752).

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

811128 is a wasteful number, since it uses less digits than its factorization.

811128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33806 (or 33802 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

The square root of 811128 is about 900.6264486456. The cubic root of 811128 is about 93.2602261975.

It can be divided in two parts, 811 and 128, that added together give a palindrome (939).

The spelling of 811128 in words is "eight hundred eleven thousand, one hundred twenty-eight".