811456 has 28 divisors (see below), whose sum is σ = 1666240. Its totient is φ = 391680.

The previous prime is 811441. The next prime is 811457. The reversal of 811456 is 654118.

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 811456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811457) by changing a digit.

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, 1780 + ... + 2188.

2⁸¹¹⁴⁵⁶ 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 811456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833120).

811456 is an abundant number, since it is smaller than the sum of its proper divisors (854784).

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

811456 is a wasteful number, since it uses less digits than its factorization.

811456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 442 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 811456 is about 900.8085257145. The cubic root of 811456 is about 93.2727952092.

The spelling of 811456 in words is "eight hundred eleven thousand, four hundred fifty-six".