1800198042 has 48 divisors (see below), whose sum is σ = 3732391872. Its totient is φ = 578724160.

The previous prime is 1800198019. The next prime is 1800198047. The reversal of 1800198042 is 2408910081.

It is a junction number, because it is equal to n+sod(n) for n = 1800197994 and 1800198012.

It is not an unprimeable number, because it can be changed into a prime (1800198047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 940078 + ... + 941990.

It is an arithmetic number, because the mean of its divisors is an integer number (77758164).

Almost surely, 2^1800198042 is an apocalyptic number.

1800198042 is an abundant number, since it is smaller than the sum of its proper divisors (1932193830).

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

1800198042 is a wasteful number, since it uses less digits than its factorization.

1800198042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1800198042 is about 42428.7407543519. The cubic root of 1800198042 is about 1216.4850097545.

The spelling of 1800198042 in words is "one billion, eight hundred million, one hundred ninety-eight thousand, forty-two".