1808166 has 8 divisors (see below), whose sum is σ = 3616344. Its totient is φ = 602720.

The previous prime is 1808161. The next prime is 1808167. The reversal of 1808166 is 6618081.

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

1808166 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808161) 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, 150675 + ... + 150686.

It is an arithmetic number, because the mean of its divisors is an integer number (452043).

2^1808166 is an apocalyptic number.

1808166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1808166 is a wasteful number, since it uses less digits than its factorization.

1808166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301366.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1808166 is about 1344.6806312281. The cubic root of 1808166 is about 121.8277152533.

The spelling of 1808166 in words is "one million, eight hundred eight thousand, one hundred sixty-six".