228040720561788 has 24 divisors (see below), whose sum is σ = 533498959284480. Its totient is φ = 75813010000560.

The previous prime is 228040720561781. The next prime is 228040720561813. The reversal of 228040720561788 is 887165027040822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228040720561781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25070435268 + ... + 25070444363.

It is an arithmetic number, because the mean of its divisors is an integer number (22229123303520).

Almost surely, 2^{228040720561788} is an apocalyptic number.

It is an amenable number.

228040720561788 is an abundant number, since it is smaller than the sum of its proper divisors (305458238722692).

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

228040720561788 is a wasteful number, since it uses less digits than its factorization.

228040720561788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50140880017 (or 50140880015 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 60.

The spelling of 228040720561788 in words is "two hundred twenty-eight trillion, forty billion, seven hundred twenty million, five hundred sixty-one thousand, seven hundred eighty-eight".