1808906 has 8 divisors (see below), whose sum is σ = 2960064. Its totient is φ = 822220.

The previous prime is 1808887. The next prime is 1808921. The reversal of 1808906 is 6098081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 41090 + ... + 41133.

It is an arithmetic number, because the mean of its divisors is an integer number (370008).

2^1808906 is an apocalyptic number.

1808906 is a deficient number, since it is larger than the sum of its proper divisors (1151158).

1808906 is a wasteful number, since it uses less digits than its factorization.

1808906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82236.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1808906 is about 1344.9557613543. The cubic root of 1808906 is about 121.8443324985.

The spelling of 1808906 in words is "one million, eight hundred eight thousand, nine hundred six".