1808806 has 8 divisors (see below), whose sum is σ = 2720520. Its totient is φ = 901968.

The previous prime is 1808803. The next prime is 1808813. The reversal of 1808806 is 6088081.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (340065).

2^1808806 is an apocalyptic number.

1808806 is a deficient number, since it is larger than the sum of its proper divisors (911714).

1808806 is a wasteful number, since it uses less digits than its factorization.

1808806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 1808806 is about 1344.9185848965. The cubic root of 1808806 is about 121.8420871897.

Subtracting 1808806 from its reverse (6088081), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 1808806 in words is "one million, eight hundred eight thousand, eight hundred six".