1819808 has 48 divisors (see below), whose sum is σ = 3878280. Its totient is φ = 838656.

The previous prime is 1819781. The next prime is 1819819. The reversal of 1819808 is 8089181.

It can be written as a sum of positive squares in 4 ways, for example, as 1817104 + 2704 = 1348^2 + 52^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34310 + ... + 34362.

2^1819808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1939140).

1819808 is an abundant number, since it is smaller than the sum of its proper divisors (2058472).

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

1819808 is a wasteful number, since it uses less digits than its factorization.

1819808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1819808 is about 1349.0025945120. The cubic root of 1819808 is about 122.0886214465.

The spelling of 1819808 in words is "one million, eight hundred nineteen thousand, eight hundred eight".