1813198 has 12 divisors (see below), whose sum is σ = 2782728. Its totient is φ = 885920.

The previous prime is 1813177. The next prime is 1813211. The reversal of 1813198 is 8913181.

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 in 5 ways as a sum of consecutive naturals, for example, 15990 + ... + 16102.

It is an arithmetic number, because the mean of its divisors is an integer number (231894).

2^1813198 is an apocalyptic number.

1813198 is a deficient number, since it is larger than the sum of its proper divisors (969530).

1813198 is an equidigital number, since it uses as much as digits as its factorization.

1813198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 186 counting only the distinct ones).

The product of its digits is 1728, while the sum is 31.

The square root of 1813198 is about 1346.5504075229. The cubic root of 1813198 is about 121.9406232608.

The spelling of 1813198 in words is "one million, eight hundred thirteen thousand, one hundred ninety-eight".