1808266 has 8 divisors (see below), whose sum is σ = 2806020. Its totient is φ = 872928.

The previous prime is 1808243. The next prime is 1808269. The reversal of 1808266 is 6628081.

It can be written as a sum of positive squares in 2 ways, for example, as 1766241 + 42025 = 1329^2 + 205^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1808269) 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, 15531 + ... + 15646.

2^1808266 is an apocalyptic number.

1808266 is a deficient number, since it is larger than the sum of its proper divisors (997754).

1808266 is a wasteful number, since it uses less digits than its factorization.

1808266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31208.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1808266 is about 1344.7178142644. The cubic root of 1808266 is about 121.8299610919.

The spelling of 1808266 in words is "one million, eight hundred eight thousand, two hundred sixty-six".