13228187972238 has 24 divisors (see below), whose sum is σ = 28662742600128. Its totient is φ = 4409139273792.

The previous prime is 13228187972179. The next prime is 13228187972243. The reversal of 13228187972238 is 83227978182231.

13228187972238 is a `hidden beast` number, since 1 + 3 + 228 + 187 + 9 + 7 + 223 + 8 = 666.

It is a congruent number.

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, 21075195 + ... + 21693782.

It is an arithmetic number, because the mean of its divisors is an integer number (1194280941672).

Almost surely, 2^{13228187972238} is an apocalyptic number.

13228187972238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13228187972238 is an abundant number, since it is smaller than the sum of its proper divisors (15434554627890).

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

13228187972238 is a wasteful number, since it uses less digits than its factorization.

13228187972238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42786168 (or 42786165 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 13228187972238 in words is "thirteen trillion, two hundred twenty-eight billion, one hundred eighty-seven million, nine hundred seventy-two thousand, two hundred thirty-eight".