2187345384 has 160 divisors (see below), whose sum is σ = 7058810880. Its totient is φ = 619871616.

The previous prime is 2187345373. The next prime is 2187345421. The reversal of 2187345384 is 4835437812.

2187345384 is a `hidden beast` number, since 2 + 1 + 87 + 34 + 538 + 4 = 666.

It is a super-2 number, since 2×2187345384² = 9568959657812214912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 574174 + ... + 577970.

It is an arithmetic number, because the mean of its divisors is an integer number (44117568).

Almost surely, 2^2187345384 is an apocalyptic number.

2187345384 is a gapful number since it is divisible by the number (24) 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 2187345384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3529405440).

2187345384 is an abundant number, since it is smaller than the sum of its proper divisors (4871465496).

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

2187345384 is a wasteful number, since it uses less digits than its factorization.

2187345384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949 (or 3936 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 2187345384 is about 46769.0643908984. The cubic root of 2187345384 is about 1298.0929402596.

The spelling of 2187345384 in words is "two billion, one hundred eighty-seven million, three hundred forty-five thousand, three hundred eighty-four".