1820164 has 12 divisors (see below), whose sum is σ = 3211264. Its totient is φ = 902664.

The previous prime is 1820153. The next prime is 1820171. The reversal of 1820164 is 4610281.

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, 1284 + ... + 2299.

2^1820164 is an apocalyptic number.

It is an amenable number.

1820164 is a deficient number, since it is larger than the sum of its proper divisors (1391100).

1820164 is a wasteful number, since it uses less digits than its factorization.

1820164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714 (or 3712 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1820164 is about 1349.1345373980. The cubic root of 1820164 is about 122.0965821242.

The spelling of 1820164 in words is "one million, eight hundred twenty thousand, one hundred sixty-four".