1812808 has 8 divisors (see below), whose sum is σ = 3399030. Its totient is φ = 906400.

The previous prime is 1812793. The next prime is 1812817. The reversal of 1812808 is 8082181.

It can be written as a sum of positive squares in only one way, i.e., 925444 + 887364 = 962^2 + 942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113293 + ... + 113308.

2^1812808 is an apocalyptic number.

It is an amenable number.

1812808 is a deficient number, since it is larger than the sum of its proper divisors (1586222).

1812808 is a wasteful number, since it uses less digits than its factorization.

1812808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226607 (or 226603 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1812808 is about 1346.4055852528. The cubic root of 1812808 is about 121.9318799147.

Adding to 1812808 its reverse (8082181), we get a palindrome (9894989).

The spelling of 1812808 in words is "one million, eight hundred twelve thousand, eight hundred eight".