818080 has 24 divisors (see below), whose sum is σ = 1933092. Its totient is φ = 327168.

The previous prime is 818021. The next prime is 818093. The reversal of 818080 is 80818.

It is a happy number.

818080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 132496 = 828^2 + 364^2 .

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

818080 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397 + ... + 2716.

2⁸¹⁸⁰⁸⁰ is an apocalyptic number.

818080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

818080 is an abundant number, since it is smaller than the sum of its proper divisors (1115012).

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

818080 is a wasteful number, since it uses less digits than its factorization.

818080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128 (or 5120 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 818080 is about 904.4777498645. The cubic root of 818080 is about 93.5259062495.

Adding to 818080 its reverse (80818), we get a palindrome (898898).

The spelling of 818080 in words is "eight hundred eighteen thousand, eighty".