1820208 has 40 divisors (see below), whose sum is σ = 5065648. Its totient is φ = 559872.

The previous prime is 1820201. The next prime is 1820213. The reversal of 1820208 is 8020281.

It is not an unprimeable number, because it can be changed into a prime (1820201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835 + ... + 2082.

2^1820208 is an apocalyptic number.

It is an amenable number.

1820208 is an abundant number, since it is smaller than the sum of its proper divisors (3245440).

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

1820208 is a wasteful number, since it uses less digits than its factorization.

1820208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 2935 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1820208 is about 1349.1508440497. The cubic root of 1820208 is about 122.0975659562.

Adding to 1820208 its reverse (8020281), we get a palindrome (9840489).

The spelling of 1820208 in words is "one million, eight hundred twenty thousand, two hundred eight".