1830198505 has 4 divisors (see below), whose sum is σ = 2196238212. Its totient is φ = 1464158800.

The previous prime is 1830198473. The next prime is 1830198523. The reversal of 1830198505 is 5058910381.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1259753049 + 570445456 = 35493^2 + 23884^2 .

It is not a de Polignac number, because 1830198505 - 2⁵ = 1830198473 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183019846 + ... + 183019855.

It is an arithmetic number, because the mean of its divisors is an integer number (549059553).

Almost surely, 2^1830198505 is an apocalyptic number.

It is an amenable number.

1830198505 is a deficient number, since it is larger than the sum of its proper divisors (366039707).

1830198505 is an equidigital number, since it uses as much as digits as its factorization.

1830198505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366039706.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 1830198505 is about 42780.8193586799. The cubic root of 1830198505 is about 1223.2054256176.

The spelling of 1830198505 in words is "one billion, eight hundred thirty million, one hundred ninety-eight thousand, five hundred five".