985809800 has 24 divisors (see below), whose sum is σ = 2292008250. Its totient is φ = 394323840.

The previous prime is 985809791. The next prime is 985809809. The reversal of 985809800 is 8908589.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (985809791) and next prime (985809809).

It can be written as a sum of positive squares in 3 ways, for example, as 584769124 + 401040676 = 24182^2 + 20026^2 .

It is not an unprimeable number, because it can be changed into a prime (985809809) 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, 2464325 + ... + 2464724.

Almost surely, 2^985809800 is an apocalyptic number.

It is an amenable number.

985809800 is an abundant number, since it is smaller than the sum of its proper divisors (1306198450).

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

985809800 is a wasteful number, since it uses less digits than its factorization.

985809800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929065 (or 4929056 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 985809800 is about 31397.6081891599. The cubic root of 985809800 is about 995.2473817360.

The spelling of 985809800 in words is "nine hundred eighty-five million, eight hundred nine thousand, eight hundred".