818816 has 16 divisors (see below), whose sum is σ = 1631490. Its totient is φ = 409344.

The previous prime is 818813. The next prime is 818819. The reversal of 818816 is 618818.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (818813) and next prime (818819).

It can be written as a sum of positive squares in only one way, i.e., 817216 + 1600 = 904^2 + 40^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 818816.

It is not an unprimeable number, because it can be changed into a prime (818813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3071 + ... + 3326.

2⁸¹⁸⁸¹⁶ is an apocalyptic number.

It is an amenable number.

818816 is a deficient number, since it is larger than the sum of its proper divisors (812674).

818816 is an equidigital number, since it uses as much as digits as its factorization.

818816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411 (or 6399 counting only the distinct ones).

The product of its digits is 3072, while the sum is 32.

The square root of 818816 is about 904.8845230194. The cubic root of 818816 is about 93.5539452491.

The spelling of 818816 in words is "eight hundred eighteen thousand, eight hundred sixteen".