1808922 has 8 divisors (see below), whose sum is σ = 3617856. Its totient is φ = 602972.

The previous prime is 1808921. The next prime is 1808923. The reversal of 1808922 is 2298081.

It is an interprime number because it is at equal distance from previous prime (1808921) and next prime (1808923).

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

1808922 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1808922.

It is not an unprimeable number, because it can be changed into a prime (1808921) 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 3 ways as a sum of consecutive naturals, for example, 150738 + ... + 150749.

It is an arithmetic number, because the mean of its divisors is an integer number (452232).

2^1808922 is an apocalyptic number.

1808922 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.

1808922 is a wasteful number, since it uses less digits than its factorization.

1808922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301492.

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

The square root of 1808922 is about 1344.9617094921. The cubic root of 1808922 is about 121.8446917403.

The spelling of 1808922 in words is "one million, eight hundred eight thousand, nine hundred twenty-two".