2187007812 has 72 divisors (see below), whose sum is σ = 6036331392. Its totient is φ = 662126400.

The previous prime is 2187007799. The next prime is 2187007813.

It is a happy number.

2187007812 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2187007813) 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 23 ways as a sum of consecutive naturals, for example, 640213 + ... + 643619.

It is an arithmetic number, because the mean of its divisors is an integer number (83837936).

Almost surely, 2^2187007812 is an apocalyptic number.

2187007812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2187007812 is an abundant number, since it is smaller than the sum of its proper divisors (3849323580).

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

2187007812 is a wasteful number, since it uses less digits than its factorization.

2187007812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049 (or 5044 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 2187007812 is about 46765.4553276240. The cubic root of 2187007812 is about 1298.0261587966.

The spelling of 2187007812 in words is "two billion, one hundred eighty-seven million, seven thousand, eight hundred twelve".