811826 has 8 divisors (see below), whose sum is σ = 1259820. Its totient is φ = 391888.

The previous prime is 811819. The next prime is 811861. The reversal of 811826 is 628118.

It can be written as a sum of positive squares in 2 ways, for example, as 811801 + 25 = 901^2 + 5^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×811826² = 1318122908552, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 811795 and 811804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6941 + ... + 7056.

2⁸¹¹⁸²⁶ is an apocalyptic number.

811826 is a deficient number, since it is larger than the sum of its proper divisors (447994).

811826 is a wasteful number, since it uses less digits than its factorization.

811826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14028.

The product of its digits is 768, while the sum is 26.

The square root of 811826 is about 901.0138733671. The cubic root of 811826 is about 93.2869696028.

The spelling of 811826 in words is "eight hundred eleven thousand, eight hundred twenty-six".