2185385000 has 40 divisors (see below), whose sum is σ = 5120368770. Its totient is φ = 874152000.

The previous prime is 2185384973. The next prime is 2185385009. The reversal of 2185385000 is 5835812.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 203176516 + 1982208484 = 14254^2 + 44522^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2185385009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 213539 + ... + 223538.

Almost surely, 2^2185385000 is an apocalyptic number.

2185385000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185385000 is an abundant number, since it is smaller than the sum of its proper divisors (2934983770).

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

2185385000 is an equidigital number, since it uses as much as digits as its factorization.

2185385000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437103 (or 437084 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2185385000 is about 46748.1015657321. The cubic root of 2185385000 is about 1297.7050238891.

The spelling of 2185385000 in words is "two billion, one hundred eighty-five million, three hundred eighty-five thousand".