2187879824 has 20 divisors (see below), whose sum is σ = 4565095836. Its totient is φ = 1009790592.

The previous prime is 2187879823. The next prime is 2187879871. The reversal of 2187879824 is 4289787812.

It can be written as a sum of positive squares in 2 ways, for example, as 392832400 + 1795047424 = 19820^2 + 42368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2187879824.

It is not an unprimeable number, because it can be changed into a prime (2187879823) 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 3 ways as a sum of consecutive naturals, for example, 5259119 + ... + 5259534.

Almost surely, 2^2187879824 is an apocalyptic number.

It is an amenable number.

2187879824 is an abundant number, since it is smaller than the sum of its proper divisors (2377216012).

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

2187879824 is a wasteful number, since it uses less digits than its factorization.

2187879824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518674 (or 10518668 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 56.

The square root of 2187879824 is about 46774.7776477879. Note that the first 3 decimals coincide. The cubic root of 2187879824 is about 1298.1986538339.

The spelling of 2187879824 in words is "two billion, one hundred eighty-seven million, eight hundred seventy-nine thousand, eight hundred twenty-four".