28013780347218 has 24 divisors (see below), whose sum is σ = 62176927113756. Its totient is φ = 9110172470400.

The previous prime is 28013780347193. The next prime is 28013780347271. The reversal of 28013780347218 is 81274308731082.

28013780347218 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 3 + 7 + 80 + 347 + 218 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20362177927809 + 7651602419409 = 4512447^2 + 2766153^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18979525243 + ... + 18979526718.

Almost surely, 2^{28013780347218} is an apocalyptic number.

28013780347218 is an abundant number, since it is smaller than the sum of its proper divisors (34163146766538).

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

28013780347218 is a wasteful number, since it uses less digits than its factorization.

28013780347218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37959052010 (or 37959052007 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 28013780347218 in words is "twenty-eight trillion, thirteen billion, seven hundred eighty million, three hundred forty-seven thousand, two hundred eighteen".