811928 has 32 divisors (see below), whose sum is σ = 1691760. Its totient is φ = 362880.

The previous prime is 811919. The next prime is 811931. The reversal of 811928 is 829118.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 811928.

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, 3743 + ... + 3953.

2⁸¹¹⁹²⁸ 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 811928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845880).

811928 is an abundant number, since it is smaller than the sum of its proper divisors (879832).

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

811928 is a wasteful number, since it uses less digits than its factorization.

811928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 263 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 811928 is about 901.0704744913. The cubic root of 811928 is about 93.2908763810.

The spelling of 811928 in words is "eight hundred eleven thousand, nine hundred twenty-eight".