1808798 has 4 divisors (see below), whose sum is σ = 2713200. Its totient is φ = 904398.

The previous prime is 1808773. The next prime is 1808801. The reversal of 1808798 is 8978081.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452198 + ... + 452201.

It is an arithmetic number, because the mean of its divisors is an integer number (678300).

2^1808798 is an apocalyptic number.

1808798 is a deficient number, since it is larger than the sum of its proper divisors (904402).

1808798 is an equidigital number, since it uses as much as digits as its factorization.

1808798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904401.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 1808798 is about 1344.9156107355. The cubic root of 1808798 is about 121.8419075614.

The spelling of 1808798 in words is "one million, eight hundred eight thousand, seven hundred ninety-eight".