228581211790 has 16 divisors (see below), whose sum is σ = 413744766480. Its totient is φ = 90921688000.

The previous prime is 228581211737. The next prime is 228581211799. The reversal of 228581211790 is 97112185822.

It is a self number, because there is not a number n which added to its sum of digits gives 228581211790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228581211799) 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, 63847711 + ... + 63851290.

It is an arithmetic number, because the mean of its divisors is an integer number (25859047905).

Almost surely, 2^228581211790 is an apocalyptic number.

228581211790 is a deficient number, since it is larger than the sum of its proper divisors (185163554690).

228581211790 is a wasteful number, since it uses less digits than its factorization.

228581211790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127699187.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 228581211790 in words is "two hundred twenty-eight billion, five hundred eighty-one million, two hundred eleven thousand, seven hundred ninety".