1808946 has 32 divisors (see below), whose sum is σ = 4065600. Its totient is φ = 596160.

The previous prime is 1808923. The next prime is 1808951. The reversal of 1808946 is 6498081.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1808946.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7386 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (127050).

2^1808946 is an apocalyptic number.

1808946 is an abundant number, since it is smaller than the sum of its proper divisors (2256654).

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

1808946 is a wasteful number, since it uses less digits than its factorization.

1808946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1808946 is about 1344.9706316496. The cubic root of 1808946 is about 121.8452305989.

The spelling of 1808946 in words is "one million, eight hundred eight thousand, nine hundred forty-six".