1819998216 has 48 divisors (see below), whose sum is σ = 4934065500. Its totient is φ = 606062592.

The previous prime is 1819998181. The next prime is 1819998253. The reversal of 1819998216 is 6128999181.

It can be written as a sum of positive squares in 2 ways, for example, as 1548737316 + 271260900 = 39354^2 + 16470^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63480 + ... + 87576.

Almost surely, 2^1819998216 is an apocalyptic number.

It is an amenable number.

1819998216 is an abundant number, since it is smaller than the sum of its proper divisors (3114067284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1819998216 is a wasteful number, since it uses less digits than its factorization.

1819998216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25158 (or 25151 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The square root of 1819998216 is about 42661.4371065955. The cubic root of 1819998216 is about 1220.9287508204.

The spelling of 1819998216 in words is "one billion, eight hundred nineteen million, nine hundred ninety-eight thousand, two hundred sixteen".