2087821384 has 32 divisors (see below), whose sum is σ = 4495312800. Its totient is φ = 899061120.

The previous prime is 2087821381. The next prime is 2087821397. The reversal of 2087821384 is 4831287802.

It is a self number, because there is not a number n which added to its sum of digits gives 2087821384.

It is not an unprimeable number, because it can be changed into a prime (2087821381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 622677 + ... + 626020.

It is an arithmetic number, because the mean of its divisors is an integer number (140478525).

Almost surely, 2^2087821384 is an apocalyptic number.

It is an amenable number.

2087821384 is an abundant number, since it is smaller than the sum of its proper divisors (2407491416).

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

2087821384 is a wasteful number, since it uses less digits than its factorization.

2087821384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248733 (or 1248729 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 2087821384 is about 45692.6841408994. The cubic root of 2087821384 is about 1278.0988590123.

The spelling of 2087821384 in words is "two billion, eighty-seven million, eight hundred twenty-one thousand, three hundred eighty-four".