818826 has 8 divisors (see below), whose sum is σ = 1637664. Its totient is φ = 272940.

The previous prime is 818821. The next prime is 818827. The reversal of 818826 is 628818.

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

818826 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 818826.

It is not an unprimeable number, because it can be changed into a prime (818821) by changing a digit.

818826 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68230 + ... + 68241.

It is an arithmetic number, because the mean of its divisors is an integer number (204708).

2⁸¹⁸⁸²⁶ is an apocalyptic number.

818826 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

818826 is a wasteful number, since it uses less digits than its factorization.

818826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136476.

The product of its digits is 6144, while the sum is 33.

The square root of 818826 is about 904.8900485694. The cubic root of 818826 is about 93.5543260981.

Adding to 818826 its product of digits (6144), we get a triangular number (824970 = T₁₂₈₄).

The spelling of 818826 in words is "eight hundred eighteen thousand, eight hundred twenty-six".