1808330 has 16 divisors (see below), whose sum is σ = 3304800. Its totient is φ = 712272.

The previous prime is 1808327. The next prime is 1808377. The reversal of 1808330 is 338081.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1808296 and 1808305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (206550).

2^1808330 is an apocalyptic number.

1808330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1808330 is a deficient number, since it is larger than the sum of its proper divisors (1496470).

1808330 is a wasteful number, since it uses less digits than its factorization.

1808330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1808330 is about 1344.7416108681. The cubic root of 1808330 is about 121.8313983851.

The spelling of 1808330 in words is "one million, eight hundred eight thousand, three hundred thirty".