1804398 has 8 divisors (see below), whose sum is σ = 3608808. Its totient is φ = 601464.

The previous prime is 1804391. The next prime is 1804399. The reversal of 1804398 is 8934081.

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

1804398 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804391) 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, 150361 + ... + 150372.

It is an arithmetic number, because the mean of its divisors is an integer number (451101).

2^1804398 is an apocalyptic number.

1804398 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.

1804398 is a wasteful number, since it uses less digits than its factorization.

1804398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300738.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1804398 is about 1343.2788243697. The cubic root of 1804398 is about 121.7430316444.

The spelling of 1804398 in words is "one million, eight hundred four thousand, three hundred ninety-eight".