1998395 has 8 divisors (see below), whose sum is σ = 2740704. Its totient is φ = 1370304.

The previous prime is 1998379. The next prime is 1998397. The reversal of 1998395 is 5938991.

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

It is a cyclic number.

It is not a de Polignac number, because 1998395 - 2⁴ = 1998379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1998397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28514 + ... + 28583.

It is an arithmetic number, because the mean of its divisors is an integer number (342588).

2^1998395 is an apocalyptic number.

1998395 is a deficient number, since it is larger than the sum of its proper divisors (742309).

1998395 is an equidigital number, since it uses as much as digits as its factorization.

1998395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57109.

The product of its digits is 87480, while the sum is 44.

The square root of 1998395 is about 1413.6459952902. The cubic root of 1998395 is about 125.9583930819.

The spelling of 1998395 in words is "one million, nine hundred ninety-eight thousand, three hundred ninety-five".