2186685000 has 120 divisors (see below), whose sum is σ = 7400623230. Its totient is φ = 583104000.

The previous prime is 2186684989. The next prime is 2186685001. The reversal of 2186685000 is 5866812.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 58339044 + 2128345956 = 7638^2 + 46134^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2186685001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 20704 + ... + 69296.

Almost surely, 2^2186685000 is an apocalyptic number.

2186685000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2186685000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3700311615).

2186685000 is an abundant number, since it is smaller than the sum of its proper divisors (5213938230).

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

2186685000 is a wasteful number, since it uses less digits than its factorization.

2186685000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48625 (or 48603 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2186685000 is about 46762.0038065094. The cubic root of 2186685000 is about 1297.9622908585.

The spelling of 2186685000 in words is "two billion, one hundred eighty-six million, six hundred eighty-five thousand".