200081800 has 24 divisors (see below), whose sum is σ = 465190650. Its totient is φ = 80032640.

The previous prime is 200081779. The next prime is 200081813. The reversal of 200081800 is 8180002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 190384804 + 9696996 = 13798^2 + 3114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500005 + ... + 500404.

Almost surely, 2^200081800 is an apocalyptic number.

200081800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200081800 is an abundant number, since it is smaller than the sum of its proper divisors (265108850).

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

200081800 is a wasteful number, since it uses less digits than its factorization.

200081800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000425 (or 1000416 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 200081800 is about 14145.0273948126. The cubic root of 200081800 is about 584.8832649924.

The spelling of 200081800 in words is "two hundred million, eighty-one thousand, eight hundred".