1808994 has 16 divisors (see below), whose sum is σ = 3947040. Its totient is φ = 548160.

The previous prime is 1808993. The next prime is 1809029. The reversal of 1808994 is 4998081.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1808993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13639 + ... + 13770.

It is an arithmetic number, because the mean of its divisors is an integer number (246690).

2^1808994 is an apocalyptic number.

1808994 is an abundant number, since it is smaller than the sum of its proper divisors (2138046).

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

1808994 is a wasteful number, since it uses less digits than its factorization.

1808994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27425.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1808994 is about 1344.9884757871. The cubic root of 1808994 is about 121.8463083018.

The spelling of 1808994 in words is "one million, eight hundred eight thousand, nine hundred ninety-four".