811712 has 28 divisors (see below), whose sum is σ = 1758696. Its totient is φ = 368640.

The previous prime is 811709. The next prime is 811729. The reversal of 811712 is 217118.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 1280.

2⁸¹¹⁷¹² 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 811712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879348).

811712 is an abundant number, since it is smaller than the sum of its proper divisors (946984).

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

811712 is a wasteful number, since it uses less digits than its factorization.

811712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 1166 counting only the distinct ones).

The product of its digits is 112, while the sum is 20.

The square root of 811712 is about 900.9506090791. The cubic root of 811712 is about 93.2826028164.

The spelling of 811712 in words is "eight hundred eleven thousand, seven hundred twelve".