1820166 has 8 divisors (see below), whose sum is σ = 3640344. Its totient is φ = 606720.

The previous prime is 1820153. The next prime is 1820171. The reversal of 1820166 is 6610281.

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

1820166 is an admirable number.

It is a Curzon number.

It is a congruent 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, 151675 + ... + 151686.

It is an arithmetic number, because the mean of its divisors is an integer number (455043).

2^1820166 is an apocalyptic number.

1820166 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.

1820166 is a wasteful number, since it uses less digits than its factorization.

1820166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303366.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1820166 is about 1349.1352786137. The cubic root of 1820166 is about 122.0966268442.

The spelling of 1820166 in words is "one million, eight hundred twenty thousand, one hundred sixty-six".