80818 has 8 divisors (see below), whose sum is σ = 128412. Its totient is φ = 38016.

The previous prime is 80809. The next prime is 80819. The reversal of 80818 is 81808.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80089 + 729 = 283^2 + 27^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 80792 and 80801.

It is not an unprimeable number, because it can be changed into a prime (80819) by changing a digit.

80818 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, 1155 + ... + 1222.

2⁸⁰⁸¹⁸ is an apocalyptic number.

80818 is a deficient number, since it is larger than the sum of its proper divisors (47594).

80818 is a wasteful number, since it uses less digits than its factorization.

80818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

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

The square root of 80818 is about 284.2850681974. The cubic root of 80818 is about 43.2350567062.

Subtracting 80818 from its reverse (81808), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 80 and 818, that added together give a palindrome (898).

The spelling of 80818 in words is "eighty thousand, eight hundred eighteen".