2185445812 has 72 divisors (see below), whose sum is σ = 4575045888. Its totient is φ = 901843200.

The previous prime is 2185445791. The next prime is 2185445851.

2185445812 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7118563 + ... + 7118869.

It is an arithmetic number, because the mean of its divisors is an integer number (63542304).

Almost surely, 2^2185445812 is an apocalyptic number.

2185445812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2185445812 is an abundant number, since it is smaller than the sum of its proper divisors (2389600076).

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

2185445812 is a wasteful number, since it uses less digits than its factorization.

2185445812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 368 counting only the distinct ones).

The product of its digits is 102400, while the sum is 40.

The square root of 2185445812 is about 46748.7519833418. The cubic root of 2185445812 is about 1297.7170607164.

The spelling of 2185445812 in words is "two billion, one hundred eighty-five million, four hundred forty-five thousand, eight hundred twelve".