1801980200 has 24 divisors (see below), whose sum is σ = 4189604430. Its totient is φ = 720792000.

The previous prime is 1801980181. The next prime is 1801980203. The reversal of 1801980200 is 20891081.

It can be written as a sum of positive squares in 3 ways, for example, as 1568318404 + 233661796 = 39602^2 + 15286^2 .

It is not an unprimeable number, because it can be changed into a prime (1801980203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4504751 + ... + 4505150.

Almost surely, 2^1801980200 is an apocalyptic number.

1801980200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801980200 is an abundant number, since it is smaller than the sum of its proper divisors (2387624230).

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

1801980200 is a wasteful number, since it uses less digits than its factorization.

1801980200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009917 (or 9009908 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1801980200 is about 42449.7373372321. The cubic root of 1801980200 is about 1216.8863088376.

The spelling of 1801980200 in words is "one billion, eight hundred one million, nine hundred eighty thousand, two hundred".