811404 has 48 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 245520.

The previous prime is 811387. The next prime is 811411. The reversal of 811404 is 404118.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847 + ... + 1529.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁸¹¹⁴⁰⁴ 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 811404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120).

811404 is an abundant number, since it is smaller than the sum of its proper divisors (1486836).

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

811404 is a wasteful number, since it uses less digits than its factorization.

811404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 811404 is about 900.7796622926. The cubic root of 811404 is about 93.2708027870.

It can be divided in two parts, 81 and 1404, that added together give a triangular number (1485 = T₅₄).

The spelling of 811404 in words is "eight hundred eleven thousand, four hundred four".