2187887812 has 24 divisors (see below), whose sum is σ = 4184343072. Its totient is φ = 992716800.

The previous prime is 2187887809. The next prime is 2187887843.

2187887812 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 2187887812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19389 + ... + 68932.

It is an arithmetic number, because the mean of its divisors is an integer number (174347628).

Almost surely, 2^2187887812 is an apocalyptic number.

2187887812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2187887812 is a deficient number, since it is larger than the sum of its proper divisors (1996455260).

2187887812 is a wasteful number, since it uses less digits than its factorization.

2187887812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88899 (or 88897 counting only the distinct ones).

The product of its digits is 802816, while the sum is 52.

The square root of 2187887812 is about 46774.8630356092. The cubic root of 2187887812 is about 1298.2002337498.

The spelling of 2187887812 in words is "two billion, one hundred eighty-seven million, eight hundred eighty-seven thousand, eight hundred twelve".