1809898996 has 12 divisors (see below), whose sum is σ = 3205484352. Its totient is φ = 894046328.

The previous prime is 1809898991. The next prime is 1809899027. The reversal of 1809898996 is 6998989081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809898991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2725420 + ... + 2726083.

It is an arithmetic number, because the mean of its divisors is an integer number (267123696).

Almost surely, 2^1809898996 is an apocalyptic number.

It is an amenable number.

1809898996 is a deficient number, since it is larger than the sum of its proper divisors (1395585356).

1809898996 is a wasteful number, since it uses less digits than its factorization.

1809898996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451590 (or 5451588 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 67.

The square root of 1809898996 is about 42542.9077050453. The cubic root of 1809898996 is about 1218.6662383600. Note that the first 3 decimals are identical.

The spelling of 1809898996 in words is "one billion, eight hundred nine million, eight hundred ninety-eight thousand, nine hundred ninety-six".