212387381028 has 72 divisors (see below), whose sum is σ = 575787139200. Its totient is φ = 65804222016.

The previous prime is 212387381027. The next prime is 212387381033. The reversal of 212387381028 is 820183783212.

212387381028 is a `hidden beast` number, since 212 + 38 + 7 + 381 + 0 + 28 = 666.

212387381028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (212387381027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2893068 + ... + 2965571.

It is an arithmetic number, because the mean of its divisors is an integer number (7997043600).

Almost surely, 2^212387381028 is an apocalyptic number.

It is an amenable number.

212387381028 is an abundant number, since it is smaller than the sum of its proper divisors (363399758172).

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

212387381028 is a wasteful number, since it uses less digits than its factorization.

212387381028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858721 (or 5858716 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 212387381028 in words is "two hundred twelve billion, three hundred eighty-seven million, three hundred eighty-one thousand, twenty-eight".