1817940098 has 12 divisors (see below), whose sum is σ = 2952808578. Its totient is φ = 839049120.

The previous prime is 1817940073. The next prime is 1817940109. The reversal of 1817940098 is 8900497181.

It can be written as a sum of positive squares in 3 ways, for example, as 1068439969 + 749500129 = 32687^2 + 27377^2 .

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, 2688923 + ... + 2689598.

Almost surely, 2^1817940098 is an apocalyptic number.

1817940098 is a deficient number, since it is larger than the sum of its proper divisors (1134868480).

1817940098 is a wasteful number, since it uses less digits than its factorization.

1817940098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378549 (or 5378536 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1817940098 is about 42637.3087565339. The cubic root of 1817940098 is about 1220.4683541735.

The spelling of 1817940098 in words is "one billion, eight hundred seventeen million, nine hundred forty thousand, ninety-eight".