818128244 has 12 divisors (see below), whose sum is σ = 1432416804. Its totient is φ = 408866304.

The previous prime is 818128237. The next prime is 818128253. The reversal of 818128244 is 442821818.

It can be written as a sum of positive squares in 2 ways, for example, as 202492900 + 615635344 = 14230^2 + 24812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 818128198 and 818128207.

It is a congruent number.

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, 39947 + ... + 56850.

It is an arithmetic number, because the mean of its divisors is an integer number (119368067).

Almost surely, 2^818128244 is an apocalyptic number.

It is an amenable number.

818128244 is a deficient number, since it is larger than the sum of its proper divisors (614288560).

818128244 is a wasteful number, since it uses less digits than its factorization.

818128244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98914 (or 98912 counting only the distinct ones).

The product of its digits is 32768, while the sum is 38.

The square root of 818128244 is about 28602.9411774384. The cubic root of 818128244 is about 935.2774469039.

The spelling of 818128244 in words is "eight hundred eighteen million, one hundred twenty-eight thousand, two hundred forty-four".